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.
| 301. |
The algae found in high temperature ponds are capable of photosynthesis uptoA. `30^(@)`CB. `75^(@)`CC. `90^(@)`CD. `100^(@)`C |
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Answer» Correct Answer - B The maximum temprature at which photosynthesis can occur is `55^(@)C` in some desert plants and `75^(@)C` for hot spring algae. |
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| 302. |
Which of the following inhibits `O_(2)` release in light phaseA. PMAB. zeatinC. DCMUD. None of these |
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Answer» Correct Answer - C During light reaction of photosynthesis `O_(2)` release as a result of photolysis of water. DCMU is a photosynthetic inhibitor which inactivates the PS-II and inhibit the Hill reaction. |
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| 303. |
Water releases protons. Twelve water molecules will releaseA. `24 H^(+)`B. `48 H^(+)`C. `12 H^(+)`D. `6 H^(+)` |
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Answer» Correct Answer - A Water releases protons. Twelve water molecules will release `24 H^(+)`. `H_(2) to 2H^(+)+2e^(-)+[O]` |
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| 304. |
Number of chlorophyll arranged per reaction centre in the light harvesting complex areA. 100B. 200C. 300D. 400 |
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Answer» Correct Answer - C Number of chlorophyll molecules arranged per reaction centre in the light harvesting complex are 300. |
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| 305. |
Which factor is not limiting in normal conditions for photosynthesisA. AirB. `CO_(2)`C. waterD. chlorophyll |
| Answer» Correct Answer - D | |
| 306. |
Quality of light refers toA. Intensity of lightB. frequency of lightC. wavelenght of lightD. duration of light |
| Answer» Correct Answer - C | |
| 307. |
Steps in non-cyclic photophosphorylation include passage of electrons alongA. FRS `to` FD `to` Cyt `b_(6)` `to` Cytf `to` PC `to` Chl aB. Chl a `to` Cyt `b_(6)` `to` Cytf `to` PC `to` PS I `to` FRS `to` FDC. Chl a `to` PQ `to` Cyt `b_(6)` `to` Cyt f `to` PC `to` PS I `to` FRS `to` FDD. PQ `to` Cyt `b_(6)` `to` Cytf `to` PC `to` PS I `to` FRS `to` FD |
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Answer» Correct Answer - D Step in non-cyclic photophosphorylation include passage of electrons along `PQ to Cyt b_(6) Cyt fto PC to PS I to FRS to FD`. |
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| 308. |
Which one of the following one of the following is not a limiting factor for photosynthesisA. OxygenB. Carbon dioxideC. ChlorophyllD. Light |
| Answer» Correct Answer - A | |
| 309. |
`Q_(10)` refers toA. Quality quotientB. Temperature quationtC. Respiratory quotientD. quantum constant |
| Answer» Correct Answer - B | |
| 310. |
Which pigment system is inactivated in red drop?A. PS-I and PS-IIB. PS-IC. PS-IID. None of the above |
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Answer» Correct Answer - C The fall in photosynthetic yield beyond red region of spectrum (680 nm) is called red drop. Reaction centre of PS-II is `P_(680)` while that of PS-I is `P_(700)`. So in the red drop reaction PS-II is inactivated. |
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| 311. |
PS I and PS II occur overA. Grana of chloroplastB. Matrix of mitochondriaC. Stroma of chloroplastD. Inner membrane of mitochondrion |
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Answer» Correct Answer - A PS I and PS II occur over grana of chloroplast. |
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| 312. |
ETC of photosynthesis process isA. Bound to thylakoid memebraneB. Present in stromaC. Bound to outer chloroplast memebraneD. Dispersed in cytosol |
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Answer» Correct Answer - A ETC of photosynthesis process is boudn to thylakoid membrane. |
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| 313. |
If the rate of translocation of food is slow, what will be the effect on photosynthesisA. It will increaseB. It will remain sameC. Becomes doubleD. It will decrease |
| Answer» Correct Answer - D | |
| 314. |
In which of the folllowing the rate of photosynthesis is decreased and is known as red dropA. Blue lightB. Green lightC. Red light more than 680 nmD. Red light less than 680 nm |
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Answer» Correct Answer - C R. Emerson and C.M. Lewis (1943) observed that the quantum yeild of photosynthesis decreased towards the far red end of the spectrum (680 nm or longer). |
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| 315. |
The core metal of chlorophyll is Or Which element is left when chlorophyll is burntA. MnB. MgC. FeD. Ni |
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Answer» Correct Answer - B Core metal of chlorophyll is Mg. |
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| 316. |
Pigment-containing membranous extensions in some cyanobacteria areA. HeterocystsB. Basal bodiesC. PneumatophoresD. Chromatopores |
| Answer» Correct Answer - D | |
| 317. |
Anoxygenic photosynthesis is characteristic ofA. RhodospitillumB. SpirogyraC. ChlamydromonasD. Ulva |
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Answer» Correct Answer - A Anoxygenic photosynthesis (in which `O_2` is not realised ) is seen in Rhodospirillum , a purple non - sulphur bacteria. It helps an organism to trap light energy and store it as chemical energy , other than this , amoxygenic photosynthesis commuonly occurs in green sulphur / non -sulphur bacteria helocobacteria , etc. |
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| 318. |
Anoxygenic photosynthesis is characteristic ofA. RhodospirillumB. SpirogyraC. ChlamydomonesD. Ulva |
| Answer» Correct Answer - A | |
| 319. |
Chloroplast dimophism is a characteristic feature ofA. Plants with Calvin cycleB. `C_4`-plantsC. All plantsD. Only in algae |
| Answer» Correct Answer - B | |
| 320. |
Which is not an accessory pigment?A. CaroteneB. XanthophyllC. Chlorophyll aD. Chlorophyll b |
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Answer» Correct Answer - C Chlorophylla is not an accessory pigment. |
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| 321. |
Which of the following is `CO_(2)` aceptor in `C_(4)` plantsA. Phosphoenol pyruvae (PEP)B. Ribylose 1,5-diposphate(RuDP)C. Oxaloacetic acid (OAA)D. Phosphoglyeric acid |
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Answer» Correct Answer - D One of the basic features of `C_(4)` plants is that `CO_(2)` is trapped by a `CO_(2)` acceptor, phosphonol pyruvic acid present in the (PEP) chloroplasts of mesophyll cells of these leaves, leading to the formation of a 4-C compound oxaloactic acid. |
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| 322. |
The following figure shows the A. Action spectrum of photosynthesis superimposed on absorption spectrum of chlorophyll a .B. Action spectrum of photosynthesis supenmposed on absorption spectrum of chlorophyll bC. Both A and BD. Absorption spectrum of carotenoids superimposed on action spectrum of photosynthesis |
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Answer» Correct Answer - A Action spectrum of photosynthesis superimposed on absorption spectrum of chlorphyll a. |
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| 323. |
A wastage process isA. respirationB. photosynthesisC. photorespirationD. movement |
| Answer» Correct Answer - C | |
| 324. |
The energy wastage occurs duringA. Dark respirationB. PhotosynthesisC. GlycolysisD. Photorespiration |
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Answer» Correct Answer - D Photorespiration is quite different from respiration as no ATP or NADH are produced, the energy released bing lost as heat. Moreover, the process is harmful to plants because as much as half the photosynthetically fixed `CO_(2)` (in the form of RuBP) may be lost into the atmosphere through this process. |
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| 325. |
Solarisation isA. Formation of chlorophyJJB. Destruction of chlorophyllC. Utilisation of sunlightD. Effect of solar light |
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Answer» Correct Answer - B Solarisation is destruction of chlorophyll |
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| 326. |
Solarisation isA. formation of chlorophyllB. effect of excess solar radiationC. Destruction of chlorophyll by poisonsD. utilisation of sunlight |
| Answer» Correct Answer - B | |
| 327. |
The number of chlorophyll molecules required to fixA. `2500`B. `5000`C. `10000`D. `50000` |
| Answer» Correct Answer - A | |
| 328. |
Chlorophyll molecules absorb light maximum inA. green regionB. orange regionC. yellow regionD. red and blue region |
| Answer» Correct Answer - D | |
| 329. |
The graph representing absorption of light at different wavelength is calledA. absorption spectrumB. action spectrumC. Both (a) and (b)D. None of these |
| Answer» Correct Answer - A | |
| 330. |
Photosynthesis is maximum duringA. intermittent lightB. continuous strong lightC. continuous dimlightD. None of these |
| Answer» Correct Answer - A | |
| 331. |
The enzyme that is not found in a `C_(3)` plant isA. RuBP carboxylaseB. PEP carboxylaseC. NADP reductaseD. ATP synthase. |
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Answer» Correct Answer - B PEP carboxlase is found in mesophyll cells of `C_(4)` plants only. |
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| 332. |
Warbung effect refers toA. decreased photosynthetic rate at very high `O_(2)` concentrationB. increased photosynthetic rate at very high `O_(2)` concentrationC. decreased photosynthetic rate at very low `O_(2)` concentrationD. increased photosynthetic rate at very low `O_(2)` concentration |
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Answer» Correct Answer - A Oxygen is a product of photosynthesis. A small quantity of `O_(2)` is essential for photosynthesis to take place. But as `O_(2)` concentration rises, rate of photosynthesis decreases, which may be because (i) oxygen takes takes part in oxidation of photosynthetic pigments, intermediates and enzymes in the presence of strong light (photo-oxidation), (ii) oxygen is a storng quencher of excited state of chlorophyll. Oxygen competes with `CO_(2)` for reducing power. It converts RuBP-carboxylase to RuBP-oxygenase. At very high oxygen concentration, the rate of photsynthesis begins to decline in all plants. This pehnomenon is referred tp as Warnirg effect/ |
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| 333. |
Tropical plants have a ___ temperature optimum than the plants adapted to temperate climates.A. lowerB. equalC. higherD. None of these |
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Answer» Correct Answer - C The `C_(4)` plants respond to higher temperatures and show higher rate of photsoynthesis while `C_(3)` plants have a much lower temperature optimum. The temperature optimum for photosuynthesis of different plants depends on the habitate that they are adapted to. Tropical plats have a higher temperature optimum than the plants adapted to temperate climates as tropical areas have higher temperature as compared to temperate areas. |
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| 334. |
Which one is most efficent converter of sunlight ?A. SugarcaneB. RiceC. WheatD. papaya |
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Answer» Correct Answer - A `"Sugarcane/"(C_(4)` plant) is most efficient converter of sunlight. |
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| 335. |
Bacterial photosynthesis differs from photosynthesis of others inA. Not liberating oxygenB. Non-requirement of lightC. Non-fixation of energyD. Requirement of host organism |
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Answer» Correct Answer - A Bacterial photosynthesis differs from that of higher plants in not liberating oxygen. |
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| 336. |
photoyisis of each water molecule in light reaction will yieldA. 2 electrons and 4 protonsB. 4 electrons and 4 protonsC. 4 electrons and 3 protonsD. 2 electrons and 2 protons |
| Answer» Correct Answer - D | |
| 337. |
In `C_(4)` plants, sugar is produced inA. Bundle sheath cellsB. mesophyll cellsC. palisade leaf cellsD. spongy mesophyll |
| Answer» Correct Answer - A | |
| 338. |
which one is a `C_(4)`-plant ?A. PapayaB. potatoC. MaizeD. Pea |
| Answer» Correct Answer - C | |
| 339. |
The `C_(4) and C_(3)` plants differ from each other inA. Type of pigment involved in pholosythesisB. The primary acceptor of ` CO_(2)` during carbon fixationC. Type of end products of photosynthesisD. Number of NADPH that are consumed during the starch synthesis process. |
| Answer» Correct Answer - B | |
| 340. |
`C_(2)` plants differ from `C_(3)` plants with respect toA. number of ATP usedB. substrate, which accepts the `CO_2` moleculesC. the final productD. number of ATP formed |
| Answer» Correct Answer - B | |
| 341. |
If all the plants are to die, all the animals will also die due to deficiency ofA. carbon dioxideB. nitrogenC. oxygenD. Both (a) and (b) |
| Answer» Correct Answer - C | |
| 342. |
The following hypothesis, "Plants restore to the air whatever breathing animals and burning candles remove" was given byA. Joseph PriestleyB. Jan IngenhouszC. T. W. EngelmannD. C. van Niel |
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Answer» Correct Answer - A .In 1770 he performed a series of experiments that showed the essential role of air in the growth of green plants. Priestley discovered `O_(2)`, in 1774. .He experimented with a mint plant. Priestley observed that a candle burning in a closed space a bell jar, soon gets extinguished. Similarly, a mouse would soon suffocate in a closed space. He concluded that a burning candle or an animal that breathe the air, both somehow, damage the air. But when he placed a mint plant in the same bell jar, he found that the mouse stayed alive and the candle continued to burn. Priestley hypothesis: Plants restore to the air what ever breathing animals and burning candles remove. |
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| 343. |
What is true for photosynthesisA. Both carbon dioxide and water are oxidisedB. Both carbon dioxide and water are reducedC. Carbon dioxide is oxidised and water is reducedD. Carbon dioxide is reduced and water is oxidised |
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Answer» Correct Answer - D During photosynthesis carbon dioxide is reduced and water is oxidised for photosynthesis. |
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| 344. |
The First scientist to find out the role of light in photosynthesis wasA. IngenhouszB. SenebierC. PriestleyD. Sachs |
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Answer» Correct Answer - A The first scientist to find out the role of light in photosynthesis was Ingenhousz. |
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| 345. |
The concentration of protons is usually very high in .......A. thylackoid lumenB. stromaC. granal membraneD. cytosol |
| Answer» Correct Answer - A | |
| 346. |
The process in which water is split during photosynthesis isA. RuBP carboxylaseB. HexokinaseC. PhosphataseD. Nuclease |
| Answer» Correct Answer - B | |
| 347. |
Who demonstrated for the first time that in photosynthesis, oxygen is evolved from waterA. Ruben and KamenB. CalvinC. R. HillD. Govindji |
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Answer» Correct Answer - C R. Hill demonstrated for the first time that in photosynthesis, oxygen is evolved from water. |
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| 348. |
In the process of photosynthesis , water moleculs breaks isA. PlasmolysisB. Photolysis of `H_(2)O`C. hydrolysisD. Hemolysis |
| Answer» Correct Answer - B | |
| 349. |
Who demonstrated for the first time that in photosynthesis, oxygen is evolved from waterA. SpirogyraB. VolvoxC. ChlamydomonasD. Chlorella |
| Answer» Correct Answer - D | |
| 350. |
Essentiality of light in photosynthesis can be demonstrated byA. Molles half leaf experimentB. Ganong screenC. Inverted funnel experimentD. KOH solution |
| Answer» Correct Answer - B | |