Photosynthesis

Questionbank Biology

Unit -IV Chapter-16. Photosynthesis IMPORTANT POINTS Green plants make their own food foo d by photosynthesis. photosynthesis. During this process carbon dioxide dioxide form the t he atmosphere is taken t aken in by leaves through stomata sto mata and used us ed for making carbohydrates, princi pr incipally pally glucose glucose and starch. star ch. Photosynthsis Phot osynthsis takes place plac e only in the green parts part s of the plants, mainly the leaves. Withi Within n the leaves, the t he mesophyll cells have a large large number of chloroplast chloroplastss that are ar e responsible res ponsible for CO2 fixation. fixation. Within Within the chloroplasts, tthe he membranes membranes are sites site s for the t he light light reaction, react ion, while while the chemosynthetic pathway pathway occurs in the stroma. str oma. photosynthesis has two stages stag es the light reaction and the carbon car bon fixi fixing ng reations. in the light reaction re action the t he light energy is absorbed by the pigments present pres ent in the antenna ant enna and funnelled funnelled to special chlorophyll chlorophyll a molecules molecules called reaction centre chlorophylls chlorophylls there are two photosystems, PS I and PS II. PS P S I has a 700 nm absorbing chlorophyll a P700 molecule at its reaction reac tion center, cente r, while while PS II has a P680 reaction react ion centre that t hat absorbs red loght at 680 nm After absorbing light, light, electrons electr ons are excited excited and transferred through t hrough PS II and PS I and finall finally y to NAD forming forming NADH. during this process a proton gradient gradient due to movement movement through the t he thylakoid thylakoid The breakdown of the protons prot ons gradient due to movement movement through throu gh the F0 part of the t he ATPase enzyme release releasess enough energy e nergy for for synthesis of ATP splitting of water molecles molecles is associated with PS II resulting resulting in the release of 02, prot ons and transfer of electrons to PS II In the carbon fixation cy cyale, ale, CO2 is added by the enzyme, enzyme, RuBisCO, to a 5 carbon compound RuBP that is converted to t o 2 molecules of 3- carbon PGA. this t his is then converted convert ed to sugar s ugar by the Calvin cycle, cycle, and the RuBp is regenerated. regenera ted. During this process proces s ATP and NADPH synthesised synthesised in the light reaction react ion are utilsed RuBisCO also catalyses a wasteful oxygenation oxygenation reaction reac tion in C3 plants: Photorespirat Photo respiration ion Some tropical plants show a special type of photosynthesis photosynthesis called C4 pathway in these plants the first product product of CO2 fixation that ttakes akes place in the mesophyll, is is a 4-carbon 4-carbo n compound. in the bundle sheath cells cells the Calvin pathway is carried out for the synthesis of carbohydrates.

1.

The The nam namee Mel Melv vin Cal Calv vin is assoc associiated ated with with (a) synthesis of ATP ATP during photosynthesis phot osynthesis (b) release of water during photosynthesis (c) carbon fixation during photosynthesis (d) capture light light energy during photosynthesis photosynthesis

2.

3.

Who Who gave gave chem chemiical cal compos composiitions tions of chl chlorophy orophylll and and caroten carotenoi oids ds ? (A) Park and Biggins

(B) Me Meyers and French

(C) Wi Willstatt tatteer an and Sta Stah hi

(D) Arnon and Be Benson son

The The non non-p -pol olar ar par partt of chl chlorop oroph hyll is is (A) phytol

(B) porphyrin

(C) pyrrol

173

(D) none above


4.

The The approx approxim imate ate dime dimens nsion ion of chl chloroph orophy yll porphy porphyrin ring ring is. is. (A) 1 Ao sq square (B) 5 Ao square

5.

Phot Photos osy ynthes thesiis is is most ost acti activ ve in in (A) sunlight

6.

7.

11.

12.

(D) green

(B) not increase

(C) decrease

(D) increase till feed back inhibition.

Out Out of the the total light ght energ energy y that that is ava avaiilabl able for for plan plants ts is is (B) 75 %

(C) 25 %

(D) 1––2%

One One photon photon is is blu bluee ligh lightt contain contains... s....kc .kcal al and and of red red ligh light.... t....kca kcall (B) 220 ; 70

(C) 10 ; 90

(D) 90 ; 10

The The most most eff efficien cientt conv converto ertorr of of sunl sunliight ght is is (A) Potato

10.

(C) red

(A) increase

(A) 70 ; 40 9.

(B) yellow

Intensi Intensity ty of ligh lightt inc increase rease 20 times, times, rate of photosy photosynth nthesi esiss will will

(A) 50 % 8.

(C) 10 Ao squ square are (D) (D) 15 15 Ao square

(B) Tomato

(C) Sugar cane

(D) Papaya

Cycl Cyclic ic photoph photophosph osphoryl orylati ation on is confi confine ned d to (A) Photosystem I

(B) Photosystem II

(C) both a & b

(D) none above

For synthe synthesis sis of one gram of hexose hexose,, the land land plant plant consum consumes. es. (A) Only 1/3 of the CO 2 of of air

(B) Only 1/4 of the CO2 of air

(C) Only 2/3 of the CO2 of of air

(D) none of the above

For synth synthesi esiss of one glucose glucose molec molecule ule,, the number number of ATP requi required red are (A) 9 ATP ATP for C3 cycle and a nd 20 ATP ATP for C4 cycle (B) 18 ATP ATP for C3 cycle and a nd 30 ATP ATP for C4 cycle (C) 22 ATP ATP for C3 cycle and a nd 35 ATP ATP for C4 cycle (D) 24 ATP ATP for C3 cycle and a nd 36 ATP ATP for C4 cycle

13. 13.

14.

15.

The volume ume of O2 librate librated d in photosynthesis photo synthesis has the following following ratio to t o CO2. (A) O2/CO2 = 1

(B) O2/CO2 = 1/2

(C) O2/CO2 = 2/1

(D) O2/CO2 = 3/1

The The inhi inhibi biti ting ng ef effect fect of oxy oxyge gen n in in C3 plants on photosynthesis is (A) solarization

(B) photooxidation

(C) Warbug’s effect

(D) none above

Pick up C4 plant. (A) Papaya

16.

17.

(B) Potato

(C) Maize

(D) Pea

It is advan advantageous tageous to use a water plant plant to demonstrate demonstrate photosy photosynth nthesi esiss other than a land land plan plantt because. because. (A) it photosynthesize photo synthesize rapidly

(B) it respires respire s slowly

(C) it does not transpire

(D) O2 bubbles bubbles from cut and can ca n be collected over H 2O.

For chloroph chlorophyl ylll forma formation tion most im important portant are (A) Fe++ and Ca++ (B) Fe++ and Mg++ (C) Mg++ and Ca++

174

(D) all the above


18.

Tran Transl slocati ocation on of sugar sugar in angi angiosper osperms ms occur occur in in form form of of (A) glucose

19.

20.

21.

22.

23.

24.

25.

(B) starch

(C) lactose

(D) sucrose

Q10 is (A) (A) res respirato ratory ry coef oefficients

(B) (B) photos tosynthe thetic tic coef oefficient

(C) ph photosynthetic yi yield

(D) te temperature co coeffiecient

Photor Photores espi pira rati tion on is is fav favou oure red d by (A) low temperatures

(B) low light intensity

(C) high O2 and low CO2

(D) low O2 and high CO 2

Quinones are (A) (A) mob mobiile el electr ectron on carr carriiers ers

(B) (B) enz enzymes of of ox oxidativ tive ph phosp osphory orylation tion

(C) en enzymes of krebs cycle

(D) none of the above

During During dark dark reaction, reaction, for for the fixati fixation on of carbon carbon,, the three carbon carbon atoms atoms of each molecu molecule le of 3 – phospho phosphogy gylce lceric ric acid acid (PGA) (PGA) are derived derived from (A) RuBP only

(B) CO2 only

(C) RuBP + CO2

(D) RuBP + CO 2 + PEP P EP..

Calvi Calvin n cycle cycle util utilize ize for fixati fixation on of 3 molecul molecules es of CO2 (A) 9 ATP and 6 NADPH NADP H2

(B) 8 ATP and 8 NADPH 2

(C) 9 ATP ATP and 3 NADPH 2

(D) 6 ATP ATP and 6 NADPH 2

Chlor Chloropl oplast ast has has maxi maxim mum quanti quantity ty of... of....i .in n stroma stroma (A) dehydrogenase

(B) RuBP carboxylase

(C) pyruvic carboxylase

(D) hexokinase

If thylako thylakoids ids are are removed removed and kept in culture culture medi medium um havi having ng CO CO2 and H 2O and exposed to light light ; they cannot cannot form hexose sugars as a s end product because. (A) (A) ligh ight trap trappi pin ng dev deviice abse absen nt

(B) (B) pigm pigmen ents ts P-70 P-700 0 and and P-680 P-680 not not lin linke ked d

(C) CO2 assimil assimilating ating enzym enzymes es absent (D) CO2 assimilation cannot o occur ccur in light 26.

Which Which of the followin following g plant plant is effi efficien cientt converter converter of solar energy energy whose net productivity productivity 2-4 kg/m2/yr or even e ven higher. (A) Wheat

27.

28.

29. 29.

(B) rice

(C) sugarcane

(D) bajra

The The num number ber of pho photons tons requ requir ired ed to releas releasee one mol mole of O2 in photosynthesis called. (A) quantum yield

(B) quantum requirement

(C) red drop

(D) Emerson’s effect

Calvi Calvin n cycle cycle represents represents one one of the foll followi owing ng phen phenom omenon enon.. (A) (A) oxida oxidati tive ve carb carbox oxy ylation ation

(B) (B) dark pho phosp spho hory ryllation ation

(C) da dark re respiration

(D) re reductive carboxylation

Hil Hill rea react ctiion takes takes pl place ace (A) in the absence of CO2 (B) in the presence pre sence of carbon dioxide (C) in the absence of a suitable suitable electron electro n acceptor (D) none above 175


30.

Match the names names of scientists scientists given given under Column Column – I with with their important important contributions contributions given given under Column – II ; choos choosee the answer which gives correct combination of the alphabets : Column – I(Scientists)

Column – II(Contributions)

P. Peter Mitchell

(i) Steps of dark reactio tion of photosynthesis.

Q. J. J.W. Gi Gibbas

(ii) Photosynthetic phosphorylation

R. Danial Arnon

(iii) Concept of free energy

S. Melvin Calvin

(iv) Chemiosmotic hypothesis (v) Mass flow flow hypot hypothesis hesis

(a) P = (iv), ( iv), Q = (iii), (iii), R = (ii), S = (i) ( i) (b) P = (iii), Q = (iv), R = (i), ( i), S = (i) (c) P = (iv), Q = (v), R = (iii), (iii), S= (ii) (d) P = (iv), Q = (ii ( iii), i), R = (i), S = (ii) ( ii) 31.

Match Colum Column n – I with given given under under Column Column – II ; choose the answer answer which which gives gives correct combi combinati nation: on: Column – I(Scientists)

Column – II(Contributions)

P. A pigment which absorbs red and far-red light

(i) Cytochrome

Q. Ma Main pigment in involved in transfer of electrons in

(ii) PE PEP carboxylase

photosynthesis is R. NADPH2 is is generated through....

(iii) Photochrome

S. Enzyme Enz yme which fixes fixes CO2 in in C4 pl plants

(iv) Photosystems

(a) P = (i), (i), Q = (ii) (ii),, R = (ii (iii), i), S = (iv) (iv) (b) P = (iii), (iii), Q = (i), R = (iv), S = (iii) (c) P = (iii), (iii), Q = (ii), R = (iii), (iii), S= (i) (d) P = (i), (i), Q = (ii), (ii), R = (iv), (iv), S = (iii) (iii) 32.

The The bas basic ic featur eaturee of of typi typical cal C4 plants showing ‘Kranz’ anatomy anato my is is (A) the t he presence of chloroplasts chloro plasts in mesophyll mesophyll and epidermal cells cells (B) the t he presence of chloroplasts chloroplast s in bundle sheath cells (C) the t he presence of rudim r udimentary entary chloroplasts chloroplast s in bundle bundle sheath cells and typical chloro chloroplasts plasts with well-formed grana in mesophyll cells (D) the presence presence of typical typical chloroplasts chloroplasts with well-formed grana gr ana in bundle sheath cells and rudimentary rudimentary chloroplasts chloro plasts in the mesophyll cells

33.

A. Six Six turns turns of Calvi Calvin-cy n-cycle cle result result in in the the production production of one one molecul moleculee of glucose glucose (C6H12O6) R. Three molecules of ribulose ribulose 1, 5 – bisphosphate (Ru BP) react reac t with three molecules of carbon dioxide to produce six carbon intermediates.

34.

(A) A is correct correct and and R is is its its expla explana nation tion

(B) A is correct correct but but R is not not its expl explan anatio ation n

(C) A is correct but R is wrong

(D) Both A and R are wrong

Maxim Maximum um photosy photosynthe nthesi siss occurs occurs in whic which h of these these ligh lights ts ? (A) Red

(B) Green

(C) Very high light

(D) Continuous bright light 176


35.

In C4 plants showing Kranz anatomy which of the following following is correct corr ect ? (A) Bundle sheath cells without grana and mesophyll mesophyll cells cells with grana (B) bundle sheath sheat h cells cells with grana mesophyll cells without grana (C) both are without grana (D) both are with grana

36.

37. 37.

In Blackm Blackmann’ ann’ss ‘Law of Limi Limiting ting Factors’ Factors’ the the rate of photosynthesi photosynthesiss continues continues to increase increase with with the successive increase in the amounts amounts of o f (A) (A) carb carbon on dioxi dioxide de,, li light, ght, tem temperatu perature re

(B) tempe temperat rature ure,, lig light ht,, carb carbon on di dioxi oxide

(C) (C) li light, ght, tem temperatu perature, re, carbo carbon n dioxi dioxide de

(D) light, ght, carbo carbon n diox dioxiide, de, tem temperatu perature re

Choos hoosee the the cor corre rect ct stat statem emen entt (A) Chl a is blue green pigment with formula C55H70O6 N4Mg (B) Chl a is blue blue green gre en pigment with formula C55H72O5 N4Mg (C) Chl C hl b is is yellow green gree n pigment with formula C55H70O5 N4Mg (D) Xanthop X anthophyl hylll is is pigment with formula C40H60

38.

Chlorophy Chlorophyll ll a is absent absent in in which which of the followi following ng photosyn photosynthesis thesisin ing g organism organismss ? (A) Bacteria

39. 39.

(B) Cyanobacteria

41. 41.

42.

(D) Brown algae

(C) (C) glycerate rate

(D) (D) glycine

Photo Photore resp spiirati ration on in C3 plants starts from. (A) (A) phosp osphogl oglycerate rate

40.

(C) Red algae

(B) (B) phosp osphosg osglycola olate

Which Which one of the the followi following ng is wrong in relation relation to photorespiration photorespiration ? It (A) occurs in chloroplasts

(B) occurs in dayt ime only

(C) is a characteristic of C4 pl plants

(D) is a characteristic of C3 plants

In sugar ugarca can ne pl plant CO CO2 is fixed in malic malic acid, in which the enzyme that fixes CO2 is (A) ribu ribullose biph biphosp ospha hate te carb carboxy oxyllase

(B) phosp phospho hoen enol ol pyru pyruvi vicc aci acid d carb carboxy oxyllase

(C) ri ribolose phosphate ki kinase

(D) fr fruct ose phosphat ase

Plan Plants ts are remove removed d from patie patients nts room at nigh nightt because because (A) they produce CO2 at night in more concentratio concent ration n (B) they produce CO2 all the time but release O2 also in day time t ime (C) they consume O2 at night. (D) they t hey do not photosynth photosynthesize esize at night, therefore fail to deplete CO2 of the room, roo m, hence their presence will increase CO2

43.

Who Who is that that scien scientist tist who who gave gave the Law of of lim limiti iting ng factors factors ? (A) Blackman

44.

45.

(B) Hill

(C) Liebig

(D) Von Mohi

Which Which of the foll followi owing ng is is correct for chlor chlorophy ophyll ll of cyanob cyanobacteri acteriaa ? (A) Chl a = C55H70O6 N4 Mg Mg

(B) Chl a = C55H72O5 N4 Mg

(C) Chl b = C55H72O6 N4 Mg

(D) Xanthophyll = C40H56

How many many electrons electrons are inv involv olved ed for the formati formation on of 1 mole mole of glucose glucose and and 6O2 molecules ? (A) 6

(B) 12

(C) 18

177

(D) 24


46.

A. The The atmo atmosp sphe heri ricc conc concen entrati tration on of CO2 at which photosyn photo synthesis thesis just compensation point. R. The CO2 compensation point is reached when the amount of CO2 uptake is less than that generated genera ted through respiration because the t he level of CO2 in the atmosphere is more than that required r equired for achieving achieving CO2 compensation point.

47. 47.

(A) If A is correct and and R is its its explanati explanation on

(B) If A is correct correct but R is not not its explanati explanation on

(C) If If A is co correct bu but R is wrong

(D) If If both A and R are co correct

Choos hoosee the the cor corre rect ct stat statem emen ent. t. (A) The C4 plants do not have Rubisco. Rubisco. (B) Carboxy Carbo xylation lation of RuBP leads to the t he formation of PGA and phosphoglycolate. phosphoglycolate. (C) Decarboxylation of C4 acids occurs oc curs in the t he mesophyll cells. cells. (D) In I n CAM plants Calvin’s Calvin’s cycle cycle reactions reac tions occur during night.

48.

Match the names names of scientists scientists given given under Column Column – I with with their important important contributions contributions given given under Column – II ; choos choosee the answer which gives correct combination of the alphabets : Colu Column mn – I(S I(Sci cien enti tist sts) s)

Column – II(Con (Conttribu ibution tionss)

P. Peter Mitchell

(i) Law of limiting factor

Q. Blackmann

(ii) Dark reaction

R. Daniel Arnon

(iii) Photosynthetic phosphorylation

S. Melvin Calvin

(iv) Chemiosmotic hypothesis

t. Mass Ma ss flow hyposhesis hyposhesis (A) P = (iv) ( iv) Q = (i) R = (iii ( iii)) S = (ii) ( ii) (B) P = (i) Q = (iv) R = (ii) ( ii) S = (iii) (iii) (C) P = (ii) Q = (i) R = (iii) S = (iv) (D) P = (iv) Q = (iii) R = (ii) S = (i) 49.

50.

Match Match the the foll followi owing ng with with correct correct com combi bina nation tion P. Carboxylation

(i). Oxygen evolution

Q. Phosphorylation

(ii) Photorespiration

R. Photolysis of water

(iii) Rubisco

S. Phosphoglycolate

(iv) Chemosynthesis

T. Nitrosomonas

(v)ATP

(A) P = (i) Q = (ii)

R = (iii)

S = (iv)

T = (v)

(B) P = (iii) Q = (v)

R = (i)

S = (ii)

T = (iv)

(C) P = (i) Q = (iii)

R = (v)

S = (iv)

T = (i)

(D) P = (i) Q = (iii)

R = (iv)

S = (ii)

T = (v)

Duri During ng pho photos tosy ynthes nthessi sis, s, pl plants ants (A) absorb O2, release CO2

(B) release O2, absorb CO2

(C) absorb N2, release O2

(D) absorb N2 and release NH3

178


51. 51.

52. 52.

53. 53.

A plant ant wi with low CO2 compensation point is (A) Atriplex patula

(B) Leucopoa kingii

(C) (C) Gos Gossy sypi pium um hisrs hisrsutu utum m

(D) (D) Tidestr destrom omiia obl obliingif gifoli olia

Rubi ubisco sco is is an an en enzym zyme for for (A) CO2 fi fixati xation on in dark dark reacti reaction on

(B) (B) phot photor ores espi pira rati tion on

(C) regeneration of RuBP

(D) photolysis of water

Photos otosy ynthe thesis sis in in C4 plants is relatively re latively less less limited by atmospheric CO2 levels because : (A) Four carbon c arbon acids are the primary initial initial CO2 fixation fixation production. produc tion. (B) The primary p rimary fixation fixation of CO2 is mediated mediated via PEP carboxalase. car boxalase. (C) Effective Effect ive pumping pumping of CO2 into bundlesheath cells. (D) Rubisco in C4 plants has higher affinity affinity for CO2.

54. 54.

Stom tomata of of CAM pl plants (A) are always open (B) open ope n during the day and close at right. (C) open op en during the night and close during the day da y. (D) never open

55.

The The Cal Calvi vin n cy cycle cle procee proceeds ds in in three three stage stagess 1. reduction, redu ction, during du ring which which carbohydrate carbohydrat e is formed at the expense of the photochemically phot ochemically made ATP and NADPH 2. regeneration, r egeneration, during during which the carbon dioxide acceptor ribulose ribulose – 1, 5 – biphosphate biphosphate is formed 3. carboxyl car boxylation, ation, during du ring which which carbon dioxide combines with ribulose – 1, 5 - biophosphate biophosp hate (A) 3-1-2 (B) 3-2-1

56.

(C) 1-2-3 (D) 2-1-3

A. Under Under conditi conditions ons of high high light light intens intensiity and and limi limited ted CO2 supply, supply, photoresp phot orespiration iration has a useful role in protecting protect ing the plants plants from photo-oxidative photo- oxidative damage. damage. R. If enough CO 2 is not available available to utilize light light energy for carboxylation to proceed, pro ceed, the excess exce ss energy may not cause damage da mage to plants. (A) If Assertion (A) and reason (R) both are ar e correct and R is explanation explanation to A. A. (B) If (A) and (R) both are correct cor rect but (R) is not an explanation to A. (C) If I f A is true tr ue but R is false. (D) If I f both A and R are false.

57.

A. Photos Photosy ynthes thesti tical cally ly C4 plants are less effi e fficient cient then C3 plants. R. The operaion of C4 pathway pat hway requires the t he involvement involvement of o f only bundle-sheath bundle-sheath cells. c ells. (A) If Assertion (A) and reason (R) both are ar e correct and R is explanation explanation to A. A. (B) If (A) and (R) both are correct cor rect but (R) is not an explanation to A. (C) If I f A is true tr ue but R is false. (D) If I f both A and R are false.

58.

One One of the the fol folllowing owing is electr electron on don donor or to P680 during light light reactions re actions of photosynthesis. phot osynthesis. (A) NADPH

(B) Phytochrome

(C) Chiorophyll

(D) Water 179


59.

60.

The requirem requirement ent of assimi assimilatory latory power to fix fix 6 molec molecules ules of CO2 is (A) 6 ATP, 6 NADPH

(B) 12 12 ATP, 18 18 NADPH

(C) (C) 18 18 ATP, TP, 18 18 NA NADPH DPH

(D) (D) 18 18 ATP, TP, 12 12 NA NADPH DPH

Photoresp Photorespir irati ation on and photosy photosynth nthesi esiss both both require require (A) (A) Organ rganiic fuel uel (B) (B) chlorop oroph hyll

61.

62.

(C) (C) cy cytoch tochrom romes (D) (D) energy ergy

The chemi chemical cal structure of chl chlorophyl orophylll ‘a’ varies varies from chloroph chlorophyl ylll ‘b’ ‘b’ due to differen difference ce between. between. (A) CH3 and C2H5

(B) CH3 and CH2 = CH2

(C) CH3 an and CHO

(D) CHO and CH2 = CH2

Choose the correct combinations combinations of labelli labelling ng the carbohydrate carbohydrate molecule molecule involved involved in the Calvin Calvin cycle. (A) A – RuBP, RuBP, B – Triose phosphate phosphat e C– PGA (B) A – PGA, B – RuBP, RuBP, C Triose phosphate (C) A – RuBP, RuBP, B – Triose phosphate, phosphat e, C – PGAL P GAL (D) A – RuBP, RuBP, B – PGAL, C – Triose phosphate phos phate

63.

64.

Chlorophy Chlorophyll ll molecul molecules es absorb absorb light light energy energy of wavelength wavelength (A) 300-400 nm

(B) 400-500 nm

(C) 60 600-800 nm nm

(D) 40 400-500 nm and 600-700 nm

The The reducti reduction on of ADP ADP to ATP occurs occurs by by (A) oxidation of water (B) high conc. of H + ions across the t he membrane membrane (C) oxidation oxidation of NADPH (D) release of electr electron on from PS-II to PS-I PS- I

65.

The process of ATP formation formation from from ADP in the presence of ligh lightt in chloroplast chloroplast is is called called (A) phosphorylation (B) autophosphorylation (C) photophosphorylation photophosphorylation (D) chemophosphorylation

66.

Photolysi Photolysiss of each water molecul moleculee in in ligh lightt reaction reaction will will yield yield (A) 2 electron electronss and 4 protons protons (B) 4 electron electronss and and 4 protons (C) 4 electron electronss and and 2 protons (D) 2 electro electrons ns and and 2 protons protons

67. 67.

The The enzy enzym me pai pairr com comm mon to C3 plants and EMP is (A) cytochrome cytochr ome oxidase and enolase (B) aldolase and triose phosphate isomerase (C) aldolase and enolase (D) phosphoglyceromutase and triose phosphate isomerase 180


68.

Non-cycle Non-cycle photosphoryl photosphorylation ation is is the main main photochemi photochemical cal reaction reaction in in green green plants plants because because (A) it produces pro duces assimilatory assimilatory power and oxygen (B) it initiates initiates photoly photo lysis sis of water of productions of oxy o xygen gen (C) it util ut ilizes izes more energy for oxygen production. (D) there t here is no other cycle available.

69.

.......... ................ ......... ... is is the by product product of photosy photosynth nthesi esis. s. (A) O2

70.

73.

(D) C6H12O6

(B) thylakoid

(C) grana

(D) stroma

(C) RuBP

(D) PEP

In C4 plants, the t he primary CO2 acceptor is (A) 3 - PGA

72.

(C) CO2

Site Site of of reduc reducti tion on of carb carbon on is (A) lamellae

71.

(B) H2O

(B) Oxalo acetic acid

It is estimated estimated that about about 85% of the earth’ earth’ss photosynth photosynthetic etic activi activity ty is is carried carried out by (A) t rees

(B) savannas

(C) (C) ph phytop toplank ankton tons

(D) (D) her herb baceo aceou us pl plants ants

In an experiment experiment demonstrating demonstrating the evolution evolution of oxygen oxygen in in Hydril Hydrilla, la, Sodium Sodium bicarbon bicarbonate ate is added to water in the experimental experimental set-up. set -up. What would w ould happen if all all other conditions co nditions are favourable ? (A) Amount of oxygen evolved decreases as carbon dioxide in water is absorbed by sodium bicarb bicarbonate. onate. (B) Amount of oxygen evolved increases as the avil a vilabili ability ty of carbon car bon dioxide increases (C) Amount Amount of o f oxygen evolved decreases as the t he avilability avilability of carbon dioxide increases (D) Amount of oxygen evolved increases as carbon car bon dioxide in water water is absorbed by sodium bicarbonate

74.

In C4 plants, the bundle sheath cells. (A) have thin walls walls to facilitate facilitate gaseous gaseo us exchange (B) have large intercellular spaces (C) are ar e rich in in PEP carboxylase carbo xylase (D) have a high density of chloro chloroplasts plasts

75.

In chlorophy chlorophyll ll structure four four pyrole pyrole rings rings are are united united with Mg by by their atoms of (A) N

76.

(B) C

(C) H

(D) O

The The fix fixati ation on and and red reduc ucti tion on of CO2 occur in preence of (A) ATP

(B) ATP and NADPH

(C) NADPH, chlorophyll chlorophyll and and water (D) ATP ATP,, NADPH and light light 77.

Sugar Sugar move movess in in phloe phloem m vesse vessells as ______ ______.. (a) cellulose

(b) glucose

(c) starch

(d) sucrose

(c) Cl-

(d) both (a) and (c)

78. ____ ions ions help help in photoly photolysis sis of water. water. (a) Mn++ 79.

(b) Mg++

RUBISCO enzyme is also called as ______. (a) car carboxy oxy tetr tetraa mutas tase

(b) (b) ca carbox rboxy y di mutas tase

(c) carboxy tri mutase

(d) carboxy uni mutas tase 181


80.

______ ______ is precursor precursor for abscis abscissic sic acid acid (AB (ABA) A) (a) Zeatin

81.

(b) Lutein (b) 3: 1 (b) Xanthophylls

86.

87.

(b) 8 %

90.

(a) CO2 an and Wat er

(b) Wat er and CO2

(c) Water and NADP

(d) NADPH2 and CO2

(a) CO2 an a nd Wat er

(b) Water and CO2

(c) Water and NADP

(d) NADPH2 and CO2

The visible visible product prod uct of photosynthesis photo synthesis is ______. (b) cellulose

(c) starch

(b) 54, 30

(c) 36, 60 (d) 18, 12

Glycolytic Glycolytic reversal rever sal is a part of ______. (a) aerobic respiration

(b) anaerobic respiration

(c) (c) lig ligh ht ph phase ase of photo photosy synt nth hesi esis

(d) (d) dark dark phas phasee of ph photosy otosynthes nthesiis

RuBp carboxy carboxylas lasee acts as RuBp RuBp carboxy carboxygena genase se at ______ ______ CO CO2 conc. And ______ O 2 conc.

(b) Amranthus

(c) PEP

(d) RuBP

(c) Maize

(d) Mango

Absorption Absorption spectrum of chloroph chlorophyl ylll is is maxim maximum um in _____ ligh light. t. (b) blue

(c) yellow

(d) blue-violet

The oxyg oxygen en molecu molecule le in glucose glucose formed formed during during photosynthes photosynthesis is comes comes from (b) (b) Organ rganiic aci acids (c) (c) CO2

(d) atmosphere atmosphere

Dim Dimorphic orphic chl chlorop oropla last st are presen presentt in ____ ______. __. (a) (a) ze zea mays

96. 96.

(b) OAA

Dicot Dicot whi which ch foll follow C4 C4 pathw pathway ay is__ is____. __.

(a) (a) Water 95.

(d) (d) hi high, gh, low low

The sourc ourcee of CO2 during calvin c alvin cycle in C4 plant is

(a) red 94.

(d) fructose

To produce 3 glucose glucose molecules molecules ______ ATP and ______ ______ NADPH2 molecules molecules are required.

(a) wheat 93.

(d) 12.5%

During dark phase of photosynthesis photosynthesis ______ is oxidized oxidized and and ______ is reduced

(a) Malic acid 92.

(d) blue

(c) 13%

(a) (a) low low,, low low (b) (b) low low,, hi high(c) gh(c) high, high 91.

(c) red

During light phase of photosynthesis photo synthesis ______ is oxidized and ______ is reduced. reduce d.

(a) 54, 36 89.

(d)  -carotene

Quantum yield yield of photosyn photo synthesis thesis is ______.

(a) glucose 88.

(c) Chlorophylls

(b) discontinuous white

(a) 13.5 % 85.

(d) 1: 2

In which which of the following light, rate rat e of photosynthesis photo synthesis is maximum? maximum? (a) white

84.

(c) 1: 3

Which of the following pigments contains cont ains open ope n pyrolle ring? (a) Phycobilins

83.

(d) Mevalonic acid

In young leaves ratio of carotene caro tene to t o Xanthophyll is is ____. (a) 2 : 1

82.

(c) Violaxanthin

(b) sacchrum officinale

(c) sorghum bicolor

Red pigmen gmentt in in tom tomat ato o is is (a)  -carotene

(b) Anthocyanin

(c) Ly Lycopene 182

(d) Lu Lutein

(d) al all of the these


97.

98.

99. 99.

Solari Solarisa sati tion on refer referss to ___ _____ ___. _. (a) forma formation tion of sugar sugar with with hel help p of water and and energy energy

(b) destructi destruction on of chl chloroph orophy yll

(c) synthesis of chl.

(d) both b and c

Dark Dark react reactio ion n requ requiires light ght reacti reaction on for for (a) ca carboxylation of RUBP

(b) re regeneration of RuBP

(c) reduction of PGA

(d) formation of hexose sugar

Emer Emersson eff effect ect pro prov ves (a) concep conceptt of two photosy photosyste stem m in in plan plantt

(b) (b) photop photopho hosp spho hory ryllation ation

(c) photorespiration

(d) there are light and dark reaction in photosynthesis

100. Name a plant plant which which do do not perform perform photosynthesi photosynthesiss is (a) Algae

(b) Bryophyllum

(c) cuscutta

(d)Pitcher plant

101. Light Light reaction of photosynthesi photosynthesiss results in in formati formation on of ______. ______. (a) O2

(b) NADPH + H+

(c) ATP

(d) All of these

102. C55H70O6 N4 Mg is (A) An accessory accessory pigm pigmen entt in photosyn photosynthesi thesiss

(B) Present Present in PS-II

(C) Present in all green plants

(D) All of these

103. The The ion ioniized zed chl chl.a+ (A) (A) Recei eceive vess low ener energy gy elec electr tron on

(B) (B) Recei eceiv ves high ener energy gy elec electr tron on

(C) (C) Exp Expels els low energy rgy electro ctron n

(D) (D) Exp Expels high ene energy rgy electro ctron n

104. In Calv Calviin cy cycle, cle, (A) fructose 1,6 diphophate undergoes dephosphorylation. (B) ATP is formed during dephosphoylation of fructose (C) 1,3 di PGA undergo phosphorylation (D) none of these 105. What will will happen to the t he rate of photosynthesis photosynthesis if sodium bicarbonate bicarbonate is added in the water having having hydrilla hydrilla plant in a beaker beak er (A) It will remain normal

(B) It will be decreased

(C) It will be stopped

(D) It will be accelerated

106. Which Which of the following following gas would disappear from from the atmosphere if all the photosynthetic activities were to stop? (A) Nitrogen

(B) Carbondioxide Carbondioxide

(C) Hydroge ogen

(D) Oxygen

107. Photo-oxidation Photo-oxidation of chlorophy chlorophyll ll and and cell contents as a result of high ligh lightt intensi intensity ty is known known as (A) Solar olariizati ation

(B) (B) Phot Photol oly ysis

(C) (C) Photp Photperi eriodi odism sm

(D) (D) Photo Photores respi pira rati tion on

108. Temperat Temperature ure is very very high high but but a plant is showing showing photo photosyn synthesis thesis with normal rate, probably it would be (A) C3 plant

(B) Mango plant

(C) Pea plant 183

(D) Sugarcane plant


109. For the process of photosynthesis photosynthesis all except one of the the following following items items are essential. essential. Point Point out the exception (A) CO2, optimum temperat temperature ure

(B) Glucose and oxygen

(C) Water ter and minerals

(D) Light and chlorophyll

110. The prerequi prerequisi sities ties of Calvi Calvins ns cycle cycle are (A) H2O, CO2, ATP

(B) (B ) ATP, H2O, NADPH2

(C) CO2, ATP, ATP, NADPH NAD PH 2

(D) NADPH2, H2O, CO2

111. 111. In the calvin calvin cycle, cycle, the assimil assimilatory atory power is is used during during (A) Formation of PGA (B) Conversion of PGA to PGAL (C) Formation of fructose 1-6 diphsophate from PGAL (D) Formation of glucose from fructose – di- phosphate 112. 112. Which Which is sensi sensitiv tivee to longer longer wavelength wavelength of light? light? (A) Photol tolysis

(B) PSI PSI

(C) (C) PS II

(D) Photop otoph hosphorylation tion

113. 113. In chrophy chrophyll ll structure Phytol Phytol tail is present at (A) 3rd carbon of IInd I Ind ring

(B) 2nd carbon of IIIrd ring r ing

(C) 7th carbon of IVth ring

(D) 3rd carbon of IVth ring

114. Reduction Reduction of co-enzy co-enzyme me NADP depends depends on (A) Reduction of CO2

(B) Evolution Evolution of O2

(C) (C) Photol Photoly ysis sis of water water

(D) Form Formati ation on of ATP

115. Loculu Loculuss is is the interna internall space space of (A) (A) Gran rana

(B) (B) Strom troma

(C) (C) Thy Thylakoi akoid d

(D) (D) Quan Quanta taso som me

116. Calvi Calvins ns cycl cyclee involv involves es (A) Oxidative phosphorylation (B) Oxidative carboxylation (C) Reductive carboxylation carboxylation

(D) Reductive Reductive phophoryl phophorylation ation

117. In C4 plants, carboxylation is is twice, it can ca n be represented as (A) Pyruvic acid + CO2 and malic acid + CO2 (B) RuBP + CO 2 and pyruvic acid + CO2 (C) PEPA + CO2 and RuBP + CO 2 (D) PEPA + CO2 and malic acid + CO2 118. 118. In non-cycli non-cyclicc photophosphoryl photophosphorylation ation,, all the participants participants acts as electron donor and and acceptor except (A) Chl-a of PS I (B) Chl-a of PS II (C) NADP 119. Ribb Ribbon on shaped shaped chl chloroplas oroplastt is presen presentt in (A) Zygnema Zygnema

(B) Spirogyra

(C) Chlorobium

(D) Chromatinum Chromatinum

120. Which Which of the the followi following ng protist protist is a photoautotroph photoautotroph (A) Thiobacillus Thiobacillus

(B) Ferrobacill Ferro bacillus us

(C) (C) Diat Diatom omss

(D) (D) Chl Chlorob orobiium 184

(D) Both (A) and (B)


121. Photosyn Photosynthes thesis is takes place place (A) Only in green light

(B) Only in sunlight

(C) In visib visible le light light obtained obtained from any source

(D) Only Only in high high intensi intensity ty of ligh lightt

122. Chlorophyll Chlorophyll-a -a differes differes from chlorophyll-b chlorophyll-b in having— having— (A) Methly group instead of aldehyde group (B) Aldehyde Aldehyde group instead of methyl group (C) Methyl group instead of ethyl group (D) Only phytol tail instead of head 123. In non-cy non-cyclic clic photophosp photophosphory horylati lation on (A) ATP is generated (B) Both PSI and PSII are involved involved (C) Electron flow is unidirectional (D) All the above 124. In con-cyclic con-cyclic photophosphorylation, photophosphorylation, the electron emitted emitted by P680 is replaced by electron electr on from (A) NADP (B) (B) Water

(C) Ferridoxi Ferridoxin n

(D) Chlorophy Chlorophyll ll-a -a

125. 85-90% (9/10) (9/10) of all all photosyn photosynthesi thesiss in the the world is is carried out by (A) (A) Shrub rubs

(B) (B) Alga Algaee of the the ocea ocean ns

(C) (C) Herb Herbss

(D) (D) Sci Scienti entist stss in the the labor aborato atory ry

126. Primary and secondary processes of Photo Photosyn synthesis thesis takes place place in ______ and ______ respectively respectively. (A) (A) Strom Stromaa and and gran grana

(B) (B) Strom Stromaa and and lamel amelllae

(C) Thy T hylakoid lakoid and quantasome (D) Grana and stroma stro ma 127. Which Which one occurs during during both cycli cyclicc and non-cycl non-cyclic ic photophosphory photophosphorylation lation (A) (A) Form ormati ation of ATP

(B) (B) Relea elease se of O2

(C) Formation of NADPH2

(D) Involvement Involvement of both PSI and PSII

128. The photochemical photochemical process in photosynthesis photosynthesis which which needs needs both PSI and PSII also involv involves es (A) (A) Phot Photol oly ysis sis of wate waterr

(B) (B) Z-sch -schem emee of elec electr tron on tran transf sfer er

(C) Synthesis of assimilatory assimilatory power (D) All of these 129. For synthesis synthesis of one one molecule molecule of glucose, glucose, the requirement requirement of ATP and NADPH NADPH2 is respectivel respect ively y (A) (A) 15 and and 10

(B) (B) 12 and and 8

(C) (C) 30 and and 15

(D) (D) 18 and and 12

130. Which Which of the followin following g element element is needed for chlorophyll chlorophyll biosynthesi biosynthesis? s? (A) Copper

(B) Magnesium

(C) Calcium

(D) Chlorine

131. The two enzymes enzymes responsib responsible le for for primary primary carboxyl carboxylation ation in C3 and C4 pathway, respectively are (A) RuBP carboxylase and RuBP oxygenase oxygenase (B) PEP carboxylase and RuBP carboxylase (C) RuBP carboxylase and PEP carboxylase (D) PEP carboxylase and pyruvate carboxylase 185


132. _______ _______ are placed placed one above the the other to form form stack of coins coins (A) (A) oxy oxysom somes

(B) (B) F1 particl part icles es

(C) cristae (D) thyla thylakoi koids ds

133. Unid Unidirec irection tional al flow flow of e- in in non-cyclic photopho photophosphor sphorylation ylation is (A) PSII

PS-I

(B) Water

NADP

water

PS-I

NADP

PS-II

(C) PSI

NADP

(D) Water

water

PSI

PSII

PS II NADP

134. The head head and tail of chlorophy chlorophyll ll are are made made up of (A) Pyrrole Pyrrole and tetrapyrrole

(B) Porphyri Porphyrine ne and phyrin phyrin

(C) Pophyri Pophyrine ne and phytol phytol

(D) Tetrapy etrapyrrole rrole and magn magnes esiu ium m

135. The numbn numbner er of photons needed needed for the evolution evolution of one molecul moleculee of oxygen oxygen is is (A) 8

(B) 2

(C) 12

(D) 18

136. Acti Action on spect spectrum rum is (A) A graph showing amount amount of light absorbed (B) A graph showing showing rate of photosynthesis (C) A graph showing absorption of light (D) A graph showing amount of CO 2 released 137. C40H56O2 is molecular formula of (A) Xanthophyll

(B) Carotenes

(C) Chlorophylls

(D) Phycobilli Phycobillins ns

138. Quan Quantas tasom omee contai contains ns (A) 150-200 150-200 chloroph chlorophy yll molecul molecules es

(B) 200 chlo chloroph rophy yll molecul olecules es

(C) 230-250 230-250 chlorop chlorophy hyll ll molecule oleculess

(D) 300-350 300-350 chlorop chlorophy hyll ll mole molecul cules es

139. Erythrose Erythrose monophos monophosphate phate (4C) (4C) is is formed formed during during (A) CAM pathway

(B) C4 pathway

(C) Conve Conversi rsion on of fructose fructose to glucose glucose

(D) Regen Regenerati eration on of RuBP RuBP

140. Donor and acceptor of electrons electrons is is the same chlorophyll chlorophyll molecule molecule in in (A) (A) Cycli clic phto phtoph phos osph phory oryllation ation

(B) (B) Photore otoresp spiirati ration on

(C) Substrate Substrate level level phosph phosphory oryla lation tion

(D) Non-cy Non-cycl clic ic photoph photophosph osphory oryla lation tion

141. If a photosynths photosynthsin ing g plan plantt releases releases O18, it is concluded that tthe he plant has been supplied supplied with (A) Water containing O18

(B) Oxygen in in the form of ozone

(C) Sugar containing O18

(D) Carbon dioxide containing O18

142. Which Which of the followi following ng connet connet the primary and and secondary processes of photosyn photosynthesis? thesis? (A) NADPH2

(B) ATP and NADPH2

(C) ATP

(D) Ferridoxins 186


143. C4 plants can perform photosyn photos ynthesis thesis (A) Even in low low light intensity (B) Even in low CO 2 concentration (C) Both (A) and (B) (D) Only in high intensity of light and high CO 2 144. In Hill’ Hill’ss experim experiment, ent, Hill Hill used ______ ______ as oxygen oxygen acceptor, (A) (A) Hydrog rogen

(B) (B) FAD

(C) (C) NADP NADP

(D) Haem aemoglobi obin

145. Fret chann channel el is a another another name name for (A) (A) Strom troma lamel amelllae

(B) (B) Inter Intergr gran anal al lamel amelllae

(C) (C) Gran Granaa lamel amelllae

(D) Space Space pres presen entt in strom stromaa lamel amella laee

146. Bundl Bundlee sheath sheath chl chloroplas oroplastt of C 4 plants are (A) (A) Larg Largee and and agran agranal al

(B) (B) Large arge and and gran granal al

(C) (C) Smal Smalll and and gran granal al

(D) (D) Smal Smalll and and agra agran nal

147. In C3 pathway, pathway, out of 12 molecules of 3-PGAL, 3-PGAL, how many are used for regeneration r egeneration of RuBP? (A) 12

(B) 8 (C) (C) 10

(D) 6

148. A plant plant is is kept kept in 300 ppm CO2 concentration. co ncentration. What will happen to it (a) Plant P lant will will die soon (b) Plant will grow but will not die (c) Plant will show normal photosynthesis (d) Respiration Respirat ion will will be greatly great ly decreased decrea sed 149. All plastids plastids have have essenti essentiall ally y same same structure structure because (a) They have to perform per form same function (b) They are localized in aerial parts part s of plants (c) All All plastids plastids store st ore starch, st arch, lipid and proteins prot eins (d) One type of plastid can ca n be differentiate differentiated d into another anot her type of plastid depending on cell

requirements

150 Give Give the the correct name name of indi indicated cated part part A and B (CHART) (CHART) (A) A- cytocro cytocrome-a me-a & a3

B -Thylakoid

(B) A- Thylakoid

B-cytocrome-a & a3

(C) AA- cytoc tocrome-b& f

B-Thylakoid

(D) A- cytopalsm

B-Thylakoid

151 which which process process is is indic indicated ated by the giv given en chart? chart? Ple see fig. (QUE:150)

(A)Synthesis (A)S ynthesis of ATP by chemiosmosis chemios mosis (B) Synthesis of food by chemiosmosis (C)hydrolysis (C)hydrolysis of o f water by chemiosmosis chemiosmosis (D)transfer (D)t ransfer of electron electr on by chemiosmosis chemiosmosis

187


ANSWER KEY 1

C

26

C

51

A

76

B

101 101

D

126

D

150

C

2

C

27

B

52

B

77

D

102 102

D

127

A

151

A

3

A

28

D

53

B

78

D

103 103

A

128

D

4

D

29

D

54

C

79

B

104 104

A

129

D

5

A

30

A

55

A

80

C

105 105

D

130

B

6

D

31

B

56

D

81

D

106 106

D

131

C

7

A

32

C

57

D

82

A

107 107

A

132

D

8

D

33

C

58

D

83

B

108 108

D

133

B

9

C

34

A

59

D

84

D

109 109

B

134

C

10

A

35

A

60

C

85

C

110 110

C

135

A

11

B

36

A

61

C

86

D

111 111

B

136

B

12

B

37

B

62

D

87

C

112 112

B

137

A

13

A

38

A

63

A

88

A

113 113

C

138

C

14

C

39

B

64

B

89

D

114 114

C

139

D

15

C

40

C

65

C

90

B

115 115

C

140

A

16

D

41

B

66

D

91

A

116 116

C

141

A

17

B

42

B

67

B

92

B

117 117

C

142

B

18

D

43

A

68

A

93

B

118 118

C

143

B

19

D

44

B

69

A

94

C

119 119

B

144

D

20

C

45

B

70

D

95

D

120 120

C

145

D

21

A

46

C

71

D

96

C

121 121

C

146

A

22

C

47

C

72

C

97

B

122 122

A

147

C

23

A

48

A

73

D

98

C

123 123

D

148

C

24

B

49

B

74

D

99

A

124 124

B

149

D

25

C

50

B

75

A

100

D

125 125

B

188

Photosynthesis

Recommend Documents