InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
In a controlled experiment of photosynthesis, `CO_(2)` supply is suddenly withheld, which of the following will accumulate in the plant cell?A. 3-phosphoglyceraldehydeB. Ribulose diphosphateC. glucoseD. phosphoglyceric acid |
| Answer» Correct Answer - B | |
| 452. |
Assertion: In `C_(4)` plants, photorespiration does not occurs. Reason: `C_(4)` plants have a mechanism that increaes the concentration of `CO_(2)` at the enzyme site. |
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Answer» Correct Answer - A In `C_(4)` platns photorespiration does not occur because they have a mechanism that increaes the concentration of `CO_(2)` at the enzyme site. This takes place when the `C_(4)` acid from the mesophyll is broken down in the bundle sheat cells to relaase `CO_(2)`. this results in increasing the intracellular concentration of `CO_(2)`. This ensures that the RuBisCO functions as a carboxylase. Thus. minimising the oxygenase activity. |
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| 453. |
RuBisCO isA. RuBP carboxylaseB. RuBP oxygenaseC. RuPB carboxylase-oxygenaseD. RuBP carboxydismutase. |
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Answer» Correct Answer - C The enzyme RuBisCO carries out photosynthetic carboxylation of RuBP. The enzyme was perviously called as carboxydismutase, RuBisCO is the most abundant protein of the bilogical work RuBisCO is located in the stroma on the outer surface of thylakoid membranes. As it is capable of carrying out both carboxylation and oxygenation reaction in `C_(3)` and `C_(4)` plants respectively thus it is correctly named as RuBP carboxylase-oxygenase. |
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| 454. |
Glucose synthesis occurs during which stage of `C_(3)` cycle?A. CarboxylationB. OxygenationC. ReductionD. regeneration. |
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Answer» Correct Answer - C During reduction stage of `C_(3)` cycle, as series of rections lead to the formation of glucose. The steps involve utilisation of two molecules of ATP for phosphorylation and tow of NADPH for reduction per `CO_(2)` molecule fixed. The fixation of six molecules of `CO_(2)` and 6 turns of the cycle are required for the removal of one molecule of glucose from the pathway. |
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| 455. |
The chemiosmotic theory of ATP synthesis in the chloroplast and mitochondria is based onA. membrane potentialB. proton gradientC. accumulate of `NA_""^(+)`D. accumulation of `K_""^(+)` |
| Answer» Correct Answer - B | |
| 456. |
When `CO_(2)` is added to PEP. The first stabel product synthesised isA. PyruvateB. glyceradehyde-3-phosphateC. phosphoglycerateD. oxalocetate. |
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Answer» Correct Answer - D |
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| 457. |
When `CO_(2)` is added to PEP. The first stabel product synthesised isA. pyruvateB. glyceraldehyde-3-phosphateC. phosphoglycerateD. oxaloacetate |
| Answer» Correct Answer - D | |
| 458. |
PS II is located onA. inner side of thylakoid, membraneB. outer side of thylakoid membraneC. lumen of thylakoid membraneD. stroma lamellae. |
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Answer» Correct Answer - A PS II is present on innerside (appressed part) of thylakoid membrane. |
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| 459. |
PS-I is located onA. The inner surface of thylakoid membraneB. The outer surface of thylakoid membraneC. Both surfaces of thylakoid membraneD. the stroma of chloroplasts |
| Answer» Correct Answer - B | |
| 460. |
Mathc column I with column II and select the correct option from the given codes. `{:("column I","column II"),(C_(4)"plants",(i)"Succulents"),("Chlorophyll b",(ii)"Accessory photosynthetic pigment"),("PS II",(iii)"Photoxidation of" H_(2)O),("CAM",(iv)"Kranz anatomy"):}`A. iv,ii,iii,iB. iii,ii,iv,iC. i,iii,ii,ivD. i,ii,iii,iv |
| Answer» Correct Answer - A | |
| 461. |
Chlrophyll a apeers ____ in colour and chlorophyll b appears____ in colour in the chromatogram.A. bluish green, yellowish greenB. yellowish green, bluish greenC. blue, blueD. green,green |
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Answer» Correct Answer - A |
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| 462. |
Dicarboxylic acid cycle is also known asA. Calvin cycleB. Hatch & Slack cycleC. EMP cycleD. TCA Cycle |
| Answer» Correct Answer - B | |
| 463. |
The first reaction in photorespiration isA. phosphorylationB. decarboxylationC. oxygenationD. carboxylation |
| Answer» Correct Answer - C | |
| 464. |
At comphensation pointA. respiration is more than photosynthesisB. photosynthesis is more than respirationC. photosynthesis is equal to respirationD. No photosynthesis |
| Answer» Correct Answer - C | |
| 465. |
When sunlight is on the chloroplast, pH is lowest in theA. StromaB. CytosalC. Space enclosed by thylakoid membraneD. Space enclosed by the inner and outer membrane |
| Answer» Correct Answer - C | |
| 466. |
Electron energy is used to drive protons against concentration gradient across thylakoid membrance intoA. Stroma lamellaB. Thylakoid lurnenC. StromaD. Interthylakoid space |
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Answer» Correct Answer - B Electron energy is used to drive protons against concentration gradient across thylakoid membrane into thylakoid lumen. |
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| 467. |
which of the following is crrectly for the given figureA. `A: PSII ,B: PS I,C : e^(-) "acceptor" ,D : LHC`B. `A:LHC, B: II C: e^(-) "acceptor " D : PSII`C. `A:PS I , B II ,Ps Ii , e^(-) : acceptor , D: LHC`D. `A: e^(-) "acceptor , B LHC, C:PS II ,D PSI` |
| Answer» Correct Answer - A | |
| 468. |
Which of the folloing statement is true with regard to the light reaction of phosythetc in plantsA. Chlorophll A occur with perk absoption at 680 nm in photosystem 700nm in photosytem II.B. Magnesium and and sodium ions are associed with photoyisi of water molesculesC. `O_(2)` is evolved duriing cyclic photophorylation.D. Both AtP an d`NADPH_(2)` are formaed during cyclic photophosoryation |
| Answer» Correct Answer - D | |
| 469. |
Excitaion of chlorophyyll due to light is aA. photoxidation reactionB. Endergnic reactonC. Themochemical reactionD. photochemcal reaction |
| Answer» Correct Answer - A | |
| 470. |
Solarization isA. Formation of chorophyyllB. Destruction of chorophyllC. Utilisation of sunlightD. Effects of solar light |
| Answer» Correct Answer - B | |
| 471. |
Which one of the following is not true abunt the laght reactions of photosythersA. Light energy provides energy for the the photolyisis of water through excitation of the reaction centre o fPSIIB. The flow of electrons rom water to NADP in non - cyclic electron transport produces one ATPC. Reactions of the two photosystems are needed for the reaction of NADPD. `P_(680) and P_(700)` the reaction centres of PSI and PSII respectively |
| Answer» Correct Answer - D | |
| 472. |
Which statement abont photosynthesis is falseA. The electron carriers involved in photophoshoryltaion are locted on the thyalkoid membranesB. photophsynthesis is a reddox processs in which water is oxidised and carbon dioxide is reducedC. The enzymes required for caarbon are located only in the grana of choroplastsD. In green plats ,both `PS-I and PS_II` are required for the formation of `NADPH+ H^(+)` |
| Answer» Correct Answer - C | |
| 473. |
Which statement about photosynthesis is false?A. Enzymes required for carbon fixation are located in grana of chloroplastsB. In green plants, both PS I and PS lI are required for synthesis of NADPH + `H^(+)`C. Electron carriers of photophosphorylation are located on thylakoid membranesD. Photosynthesis is a redox process in which water is oxidised and `CO_(2)` is reduced |
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Answer» Correct Answer - A Enzymes required for carbon fixation are located in stoma of chloroplasts |
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| 474. |
A molecule of glucose is fonned in Calvin cycle fromA. `6CO_(2)` + 12 ATPB. `6 CO_(2)` + 18 ATP+ 12 NADPHC. `6 CO_(2)`+ 18 ATP+ 30 NADPHD. `6 CO_(2)` + 30 ATP+ 12 NADPH |
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Answer» Correct Answer - B A molecule of glucose is formed in Calvin cycle from `6CO_(2)+18ATP +12NADPH` |
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| 475. |
The reaction that is responsible for the primary fixation of `CO_(2)` is catalysed byA. RuBP carboxylaseB. PEP carboxylaseC. RuBP carboxylase and PEP carboxylaseD. PGA synthase. |
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Answer» Correct Answer - C Carboxylase is found in mesophyll cells of `C_(4)` plants only. |
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| 476. |
The reaction that is responsible for the primary fixation of `CO_(2)` is catalysed byA. RuBP carboxylaseB. PEP carboxylaseC. RuBP carboxylase and PEP carboxylaseD. PGA synthase |
| Answer» Correct Answer - c | |
| 477. |
Red drop effect was studied byA. Van NielB. BlinkC. EmesonD. Calvin |
| Answer» Correct Answer - C | |
| 478. |
Red drop occurs in wavelengths ofA. 495 nmB. More than 680 nmC. less than 680 nmD. 586 nm |
| Answer» Correct Answer - B | |
| 479. |
Which of the following plants is a better photosynthesiser ?A. MangoB. SugarcaneC. WheatD. Rice |
| Answer» Correct Answer - B | |
| 480. |
`NADP^(+)` is reduced to NADPH inA. PS-IB. PS-IIC. Calvin cycleD. Non-cyclic photophosphorylation |
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Answer» Correct Answer - D In photosynthesis during non-cyclic photophoshorylation involving both PS-I and PS-II, electrons released during photolysis of water are transferred to PS-II and then PS-I via a series of electron carriers. `P_(700)` of PS-I releases electron after absorbing light energy This electron passes through chlorophyll X, Fe-S, ferredoxin and finally to `NADP^(+).NADP^(+)` combines with `H^(+)` (released during photolysis) with the help of NADP reductase to form NADPH. `NADP^(+)+2e^(-)+H^(+)overset("NADP reductase")toNADPH` |
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| 481. |
Palisade parenchyma is absent in leaves ofA. SoyabeanB. GramC. SorghumD. Mustard |
| Answer» Correct Answer - C | |
| 482. |
Kranz antomy is concerned withA. Having peripheal reticulum in chloroplast of bundle sheathB. Presence of distinct bundle sheath surrounded by concentric ring of mesopyhll cellsC. Dimorphic chloroplastD. Large vacuole in mesophyll cells |
| Answer» Correct Answer - B | |
| 483. |
In `C_(4)` plants , mesophyll cells and bundle sheath cells are specialized to perform, respectively,A. Light reaction and dark reactionB. Dark reaction and dark reactionC. Light reaction and photorespirationD. Photorespiration and dark reaction |
| Answer» Correct Answer - A | |
| 484. |
Read the following four statements (A-D) (A) Both, photophosphorylation and oxidative phoshorylation involve up hill transport of protons across the membrane (B) In dicot stems, a new cambium origanets from the cell of pericycle at trhe time of secondary growth (C ) Stamens in flowers of Gloriosa and Petunia are polyandrous Symbiotic nitrogen-fixers occur in the free-living state also in soil How many of the above statements are rightA. TwoB. ThreeC. FourD. One |
| Answer» Correct Answer - A | |
| 485. |
About `71%` of total global carbon is found isA. OceansB. ForestsC. Agro ecosystemD. Grasslands |
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Answer» Correct Answer - A About 70% of total global carbon occurs in oceans. |
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| 486. |
A photosystem containsA. pigments, electron acceptor & a reaction centreB. photons, protons pigments & hydrogen acceptorC. `PO_(4), ADP & H_""^(+)`D. (1) & (2) both |
| Answer» Correct Answer - A | |
| 487. |
`C_(4)` plants have carboxylationsA. fourB. threeC. twoD. one |
| Answer» Correct Answer - C | |
| 488. |
The enzyme which catalyzes the photosynthetic `C_(4)` cycle isA. RuDP carboxylaseB. PEP carboxylaseC. Carbonic anhydraseD. None of these |
| Answer» Correct Answer - B | |
| 489. |
No.of carboxylation in `C_(4)` cycle is/areA. 1B. 2C. 5D. 3 |
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Answer» Correct Answer - B Two times carboxylation occur in `C_(4)` cycle. First carboxylation is done by phosphoenole pyruvate and second in bundle sheath cell by Ribulose 1, 5 biphosphate. |
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| 490. |
Insectivorous plants usually survive inA. CalvinB. MayerC. BlackmanD. Ruben, Hassid, and Kamen |
| Answer» Correct Answer - B | |
| 491. |
NADP reduces to `NADPH_(2)` inA. Hatch and SlackB. Robert HillC. Hens kerbsD. Melvin kelvin |
| Answer» Correct Answer - B | |
| 492. |
Hills reaction completes inA. 12 and 18B. 18 and 12C. 6 and 12D. 18 and 18 |
| Answer» Correct Answer - A | |
| 493. |
The light reactions of photosyntheysis generate high energy electrons, which end up in _________. The light reactions also produce ___________ and ___________.A. oxygen, sugar, ATPB. Chlorophyll, ATP, NADPHC. NADPH, ATP, OxygenD. FADH, NADPH, oxygen |
| Answer» Correct Answer - C | |
| 494. |
ATP in non-cyclic photophosphorlyation is formed when electron passes fromA. plastocyanin to `P_(700)`B. plastoquinone to ferrodoxinC. cytochrome ƒ to plastoquinoneD. cytochrome b to cytochrome ƒ |
| Answer» Correct Answer - D | |
| 495. |
Photosynthesis cannot continue for long if during light reaction , only cyclic photophosphorylation takes place. This is becauseA. only ATP is formed `NADPH^(+) +H^(+)` is not formedB. photosystem -I stops getting excited at a wavelength of light beyond 680 nmC. there is unidirectional cyclic movement of the electronsD. there is no evolution of `O_2` |
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Answer» Correct Answer - A Assimilatory power.i.e, ATP and `NADPH_2` are produced during light reaction pf photosynthesis . As only cyclic photophosphorylation takes place , only ATP is formed and photosynthesis cannot continue for long . Because in the absence of `NADPH_2` the dark reaction of photosynthesis does not take place. |
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| 496. |
Which of the following is present in Calvin Cycle.A. Oxidative carboxylationB. Dark phosphorylationC. Dark respirationD. Reductive carboxylation |
| Answer» Correct Answer - D | |
| 497. |
Cyclic photophosphorylation operates absorbing light ofA. more than `680 µm` wavelengthB. less than 680 µm wavelengthC. less than 660 µm wavelengthD. wavelength between 660-680 µm wavelength |
| Answer» Correct Answer - A | |
| 498. |
During `C_(2)` cycle, there occursA. synthesis of sugarsB. utilisation of ATPC. synthesis of ATPD. synthesis of NADPH |
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Answer» Correct Answer - B |
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| 499. |
Which metal ion is a constituent of chlorophyll?A. IronB. CopperC. ManesiumD. Zinc |
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Answer» Correct Answer - C Magnesium is a constituent of chlorophyll chlorophylls are the green photosynthetic pigmetns. Five types of chlorophylls a,b,c,d and e occur in plants. Out of these only chlorophylls a and b occurs in the chloroplasts of higher plants Molecular formula of chlorophyll a,b,c and d are `C_(55)H_(72)O_(5)MG,C_(55)H_(70)O_(6)N_(4)Mg,C_(35)H_(32)O_(5)N_(4)Mg`. and `C_(54)H_(70)O_(6)N_(4)Mg` respectively Chlorophyll e is a rare type found in some golden algae. |
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| 500. |
Crabohydrates, the most abundant biomlecles on earth, are produced byA. Some bacteria, algae and green plantsB. Fung algae and green plantsC. All bacteria, fungi and algaeD. Vimses, fungi and bacteria |
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Answer» Correct Answer - A Carbohydrates, the most abundant biomolecules on earth are produced by some bacteria, algae and green plants. |
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