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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.
| 501. |
How many molecules of glycine are required to re lease one molecule of `CO_(2)`, in photorespiration?A. OneB. TwoC. ThreeD. Four |
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Answer» Correct Answer - B Two molecules of glycine are required to release one molecule of `CO_(2)` in photorespiration. |
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| 502. |
Hill reaction occurs inA. high altitude plantsB. total darknessC. absence of waterD. presence offerricyanide |
| Answer» Correct Answer - A | |
| 503. |
The isotope of carbon used extensively for studies in photosynthesis isA. `C^(13)`B. `C^(14)`C. `C^(15)`D. `C^(16)` |
| Answer» Correct Answer - B | |
| 504. |
In the `CO_(2)` content of the atmosphere is as high as 300 parts per millionA. All plants would get killed.B. The plants would you grow properly.C. Plants would grow for some time and then dieD. The plants would thrive well. |
| Answer» Correct Answer - D | |
| 505. |
Hill used dye for his famous Hill reactionA. Dichloroplenol Indophenol (DCPIP)B. Sulphur greenC. Methylene blueD. Eosine |
| Answer» Correct Answer - A | |
| 506. |
Which of the following constitutes Hill reactionA. Photolysis by chloroplastsB. Photolysis of water by isolated chloroplasts forming ATP and NADPHC. Photolysis of water by isolated illuminated chloroplasts causing reduction of some chemicals and liberation of oxygenD. Photolysis of water liberating oxygen and hydrogen by illuminated isolated chloroplasts |
| Answer» Correct Answer - C | |
| 507. |
In photorespiration glycolate is converted to `CO_(2)` and serine inA. MitochondriaB. ChloroplastC. PeroxisomeD. Vacuole |
| Answer» Correct Answer - A | |
| 508. |
The principle of limiting factors was proposed by:-A. WarburgB. BlackmanC. Decker and TijoD. Liederburg |
| Answer» Correct Answer - B | |
| 509. |
The carbon dioxide acceptor in Calvin cycle/ `C_(3)`- plants isA. PEPB. RuBPC. PGAD. NADP |
| Answer» Correct Answer - B | |
| 510. |
The first reaction in photorespiration isA. CarboxylationB. DecarboxylationC. OxygenationD. Phosphorylation |
| Answer» Correct Answer - C | |
| 511. |
Law of limiting factors in photosynthesis was given by:A. R.HillB. CalvinC. BlackmanD. Amon |
| Answer» Correct Answer - C | |
| 512. |
Law of limiting factors in photosynthesis was given by:A. R. HillB. CalvinC. KrebsD. Blackman |
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Answer» Correct Answer - D The law of limiting factors for photosynthesis was enunciated by Blackman (1905), |
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| 513. |
A typical light response curve of photosynthesis is shown. The limiting factos/s for photosynthesis at M and N is/are A. temperature and `CO_(2)` respectivelyB. `CO_(2)` and light respectivelyC. only `CO_(2)`D. light and `CO_(2)` respectively. |
| Answer» Correct Answer - B | |
| 514. |
The factor which is not limiting in normal conditions for photosynthesis isA. waterB. chlorophyll bC. lightD. carbon dioxide. |
| Answer» Correct Answer - B | |
| 515. |
First reaction in photosynthesis isA. Photolysis of waterB. Excitation of chlorophyll moleculesC. Formation of ATPD. Fixation of `CO_(2)` |
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Answer» Correct Answer - B First reaction in photosynthesis is excitation of chlorophyll molecules by light absorption. |
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| 516. |
Which will be the effect when very high intensity of light is supplied to a photosynthesis systemA. Process will increseB. Process will decreseC. Process will stop due to solarizationD. None of these |
| Answer» Correct Answer - C | |
| 517. |
How the light intensity affects the rate of photosynthesis ? |
| Answer» There is a linear relationshio betwween the light intensity and ` CO_(2)` fixation rate at low light intensities. At higher light intensities, gradually the rate does not show further increase as other factors become limiting . | |
| 518. |
Define the law of limiting factors. |
| Answer» The law states that if a chemical process is affected by more than one factor, then its rate will be determined by the factor , which is nearesl to its minimal value , it is the factor which directly affects the process if its quantity is changed. | |
| 519. |
Assertion : In the formation of one glucose, 686,000 calories energy are produced. Reason : The energy is provided by a total of 12 NADPH and 18 ATP.A. If both the asserition and the reasion are true and the reason is a correct explanation of the assertionB. If both the assertion and reasoni s not a correct ecplanation of the assertioC. If the assertion is true but the reason is falseD. If both the asseertion and reason are false |
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Answer» Correct Answer - A The energy balance of photosynthesis is: `6CO_(2) + 12H_(2)O overset("light")(to) C_(6)H_(12)O_(6) + 6CO_(2) + 6H_(2)O` which represents a storage of 686,000 calories per mole. This energy is provided by a total of 12 NADPH and 18 ATP molecules, which represent 750,000 calories. The efficiency reached by the PCR cycle is thus as high as `90% (686//750xx100 = 90%)`. |
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| 520. |
Assertion : Sciophytes requir higher light intensity than peliophytes. Reason : Sciphytes grow below the canopy of thees.A. If both the asserition and the reasion are true and the reason is a correct explanation of the assertionB. If both the assertion and reasoni s not a correct ecplanation of the assertioC. If the assertion is true but the reason is falseD. If the assertion is false but reason is true |
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Answer» Correct Answer - E Plants are grouped into two groups depending upon their inability or ability to tolerate high light intensity-shade plants (Sciophytes) and sun plants (Heliophytes). Sciophytes grow in poorly illuminated conditions as below the canopy of tall plants in seek of shade. Heliophytes grow in the open. |
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| 521. |
Photosynthetically active radiation (PAR) represents the following range of wavelengthA. 340-450 nmB. 400-700 nmC. 500-600nmD. 400-950 nm |
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Answer» Correct Answer - B Photosynthetically active region (PAR) of solar radiation is visible region. It consists of radiations having wavelength between 400 to 700 nm. Green plants use this wavelength in the process of manufacture of food, i.e., photosynthesis. |
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| 522. |
Of the total incident solar radiation the proportion of PAR is:A. about 60%B. less than 50%C. more than 80%D. about 70% |
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Answer» Correct Answer - B PAR (photosynthetically active radiation) designates the spectral range of solar radiation from 400-700nm that photosynthetic organisms are able to use in the process of photosynthesis. Of the total incident solar radiation the proportion of PAR is less than 50%. |
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| 523. |
Of the total incident solar radiation the proportion of PAR is:A. More than `80%`B. About `70%`C. About `60%`D. Less than `50%` |
| Answer» Correct Answer - D | |
| 524. |
Which one of the following ions is essential for photolysis of water?A. MangnaeseB. ZincC. CopperD. Boron |
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Answer» Correct Answer - A |
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| 525. |
Which of these is a type of phycobilin pigments?A. PhycocyaninB. AllophycocyaninC. PhycoerythrinD. All of these |
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Answer» Correct Answer - D Phycobilins are open tetrapyrroles which neither contain magnesium nor phytol. Phycobilins are water soluble. The pigmetns are of two types-blue (phycocyanin, allophycocyanin) and red (phycoerythrin). The pigments are useful in chromatic adaptations. They are important acessory pigments of blue-grenn algae, cryptomonads and red algae. |
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| 526. |
First reaction in photosynthesis isA. photolysis of waterB. excitation of chlorophyll moleuclesC. formation of ATPD. fixation of `CO_2` |
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Answer» Correct Answer - B Excitation of chlorophyll molecule is the first reaction . During photosynthesis, which helps in splitting of water (photolysis). |
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| 527. |
Who demonstrated photolysis of water ?A. Robin HillB. TW EngelmanC. Melvin CalvinD. P Mitchell |
| Answer» Correct Answer - A | |
| 528. |
Photolysis of water by isolated chloroplasts was demonstrated byA. Robin HillB. Van NielC. LiebigD. Calvin |
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Answer» Correct Answer - A Robert Hill (1939) first of all showed that if chloroplasts extracted from leaves of stellaria media and lamium album are suspended in a test tube containing suitable electron acceptor e.g., potassium ferrooxalate and potassium ferrixyanide, `O_(2)` is released due to photochemical splitting of water. |
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| 529. |
Photolysis of water by isolated chloroplasts was demonstrated byA. HillB. LiebigC. Van NeilD. Calvin |
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Answer» Correct Answer - A Hill (1937, 1939) demonstrated photolysis of water . He also said that hte evolution of oxygen does not require `CO_2` and also that light produces assimilatory power. |
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| 530. |
Which of the following id photophosphylationA. Produaction of ATP from ADPB. Produaction of NADPC. Syntheisis of ADP from ATPD. Production of PGA |
| Answer» Correct Answer - B | |
| 531. |
Maximum photosynthesis occurs in lightA. RedB. GreenC. Very high lightD. Continuous light |
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Answer» Correct Answer - D Maximum photosynthesis occurs in continuous light. |
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| 532. |
Which ones are primarily absorbed by carotenoids?A. Blue and greenB. Green and redC. Red and violetD. Violet and blue |
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Answer» Correct Answer - D Violet and blue are primarily absorbed by carotenoids. |
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| 533. |
`NAD^(+)`is reduced in photorespiration insideA. MitochondriaB. Mitochondria and peroxisomeC. Mitochondria and chloroplastsD. Chloroplasts and peroxisomes |
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Answer» Correct Answer - A `NAD^(+)` is reduced in photorespiration inside mitochondda. |
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| 534. |
Plants purify air duringA. PhotosynthesisB. RespirationC. TranspirationD. Desiccation |
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Answer» Correct Answer - A Plants purify air during photosynthesis as it release `O_(2)` |
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| 535. |
Photosynthesis isA. Anabolic, exergonic, and oxidation-reduction processB. Catabolic, exergonic , and oxidation -reduction processC. Anabolic, endergonic , and oxidation-reduction processD. Catabolic , endogonic , and oxidation -reduction process |
| Answer» Correct Answer - CA,,,Photosynthesis involves carbon oxide , energy and catalytic reaction | |
| 536. |
Who founded that water is an essential requirement of photosynthesis?A. J.PrsiestelyB. SaussureC. HelmontD. Ingen Housz |
| Answer» Correct Answer - B | |
| 537. |
At which step oxygen is used in peroxisome ?A. Glycolate of glyoxylateB. Glyoxylate of glycineC. Glycine to serineD. Serine to hydroxy pyruvate |
| Answer» Correct Answer - A | |
| 538. |
Law of limiting factor was given inA. 1950B. 1905C. 1920D. 1915 |
| Answer» Correct Answer - B | |
| 539. |
Law of limiting factor isA. Law of maximumB. Law of minimumC. Law of optimumD. All of the above |
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Answer» Correct Answer - B Law of limiting factor is law of minimum. |
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| 540. |
Compensation point isA. Beginning of photosynthesisB. Little photosynthesisC. Photosynthesis equal to rate of respirationD. Neither photosynthesis nor respiration |
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Answer» Correct Answer - C Compensation point is the value of a factor where there is photosynthesis equal to rate of respiration. |
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| 541. |
Which of the following is the most common `H^(+)` acceptor? |
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Answer» Correct Answer - D `NAD^(+) and NADP^(+)` is the most common H acceptor. |
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| 542. |
Which one is important in electron transport system ?A. UbiquinoneB. Acetyl CoAC. TricarboxyJic acidD. Ferricyanide |
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Answer» Correct Answer - A Ubiquinone is important in electron transport system. |
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| 543. |
The yellow colour of autumn levaes is due toA. fucoxanthinB. luteinC. lycopeneD. zeauanthin |
| Answer» Correct Answer - B | |
| 544. |
Assertion: Accessory pigments enable a wider range of wavelength of incoming light to be utilised for photosynthesis. Reason: Accessory pigments also protect chlorophyll a from photo-oxidation.A. If both assertion and reason are true and the reason 1s the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - B Accesory pigments enable a wider range of wave-length of incoming light to be utlised for photosynthesis. Accessory pigments also protect chlorophyll a from photo-oxidation. |
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| 545. |
Which of the following groups of pigments represent accessory pigment ?A. chl-b, carotenoids and phycobillinsB. chl-a, and carotenoidsC. phycobilins and carotenoidsD. xanthophylls only |
| Answer» Correct Answer - A | |
| 546. |
What does the given diagram represent with respect to the various photosynthetic process? A. `C_(2)` cycleB. Cyclic photophosphorylationC. Non-cyclic photophosphorylationD. Z-scheme of phosphorylation |
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Answer» Correct Answer - B The given diagram represents ,-cyclic phootophosphorylation that involved only PSI. |
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| 547. |
The correct equation that would represent the overall process of photosyinthesis isA. `6CO_(2)+12H_(2)OtoC_(6)H_(12)O_(6)+6HO_(2)+6O_(2)`B. `6CO_(2)+6H_(2)OtoC_(6)H_(12)O_(6)+6O_(2)`C. `CO_(2)+H_(2)Oto[CH_(2)O]+O_(2)`D. `C_(6)H_(12)O_(6)+6O_(2)to6CO_(2)+6H_(2)O` |
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Answer» Correct Answer - A The correct equation, that would represent the overall process of photosynthesis is `6CO_(2)+12H_(2)O to C_(6)H_(12)O_(6)+6H_(2)O+6O_(2)` |
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| 548. |
fill in the blanks .The water splitting with the ... a ... The water splitting complex is assoc1aA. a-PS I, b-inner, c-stroma lamellaB. a-PS II, b-outer, c-granaC. a- PS II, b-inner, c-thylakoidD. a- PS II, b-outer, c-thylakoid |
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Answer» Correct Answer - C The water splitting complex in associated with the PS II which itself is physically located on the inner side of the membrane of the thylakoid. |
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| 549. |
Rate of photosynthesis is higher inA. Very high lightB. Red lightC. Green lightD. Continous light |
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Answer» Correct Answer - D Rate of photosynthesis is higher in continuous light. |
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| 550. |
Source of `CO_(2)` for photosynthesis during day in CAM plant isA. 3-PGAB. Malic acidC. Oxalo-acetic acidD. Pyruvate |
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Answer» Correct Answer - B In CAM plants there is no kranz anatomy, but there occurs dark acicification, i.e., during night malic acid is formed. This malic acid breaks up into `CO_(2)` and pyruvic acid in day time and `CO_(2)` released is utilized in C-3 cycle. |
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