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.
| 601. |
Sugarcane show high efficiency of `CO_(2)` fixation because ofA. Calvin cycleB. Hatch and Slack cycleC. TCA cycleD. Greater sunlight |
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Answer» Correct Answer - B In 1965 kortschak, Hart and Burr working with `C^(14)O_(2)` on sugarcane leaves found `C_(4)` dicarboxylic acid, malate and aspartate to be the major labelled products in very short periods of photosynthesis. This observation was confirmed by M.D. Hatch and C.R., Slack in 1967. The Hatch-slack pathway, as this alternative `CO_(2)` fixation is called, has been found to occur in tropical and sub-tropical grasses and some dicotyledons. |
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| 602. |
In the above schematic diagram, which is plastocyaninA. aB. bC. cD. d |
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Answer» Correct Answer - D Steps in noncyclic photophosphorylation include passage of electron along `PQ to Cyt b_(6)to Cyt f to PC to PSI to FRS to FD`. |
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| 603. |
Electrons from excited chlorophyll molecule of photosystem II are accepted first byA. cytochrome -bB. cytochrome -fC. quinoneD. ferredoxin |
| Answer» Correct Answer - C | |
| 604. |
Photophosphorylation in chloroplast is most similar to which of the following mitochondrial reactions ?A. Oxidative phosphorylationB. Substrate-level phosphorylationC. Oxidative decarboxylationD. Hydrolysis |
| Answer» Correct Answer - A | |
| 605. |
In green cell the enzyme catalase is localised inA. PeroxisomesB. ChloroplastsC. LysosomcsD. Vacuoles |
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Answer» Correct Answer - A In green cell the enzyme catalase is localised in peroxisomas. |
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| 606. |
All the reactions from the reduction of `CO_2` to the formation of sugers are included inA. light reactionB. photolysisC. dark reactionD. Hill reaction |
| Answer» Correct Answer - C | |
| 607. |
In `C_(4)`-plants, the carbon dioxide fixation occurs inA. guard cellsB. spongy cellsC. palisade cellsD. bundle sheath cells |
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Answer» Correct Answer - D Kranz anatomy is characteristic features of leaves of `C_4`-plants .i.e., maize and sugarcane , in this type of anatomy , mesophyll is not differentiated into spongy and palisade cells, The bundle sheath chloroplasts are larger and agranal and mesophyll chloroplast are granal and smaller. |
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| 608. |
Enzymes required for photophosphorylation are located in ......... Of chloroplastA. peristromiumB. plastidomeC. stromaD. quantasome |
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Answer» Correct Answer - D Enzymes that are required during the process of phophorylation are located in the quantasome of the chloroplast. |
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| 609. |
Choose the correct statement for the fixation of one `CO_(2)` moleculeA. 3 ATP & 2 NADPH are required through calvin cycleB. 5 ATP & 2 NADPH are required through Hatch & stack cycleC. Photochemical reactions are involved in photolysis of water & phosphorylation of ADP into ATPD. all of the above |
| Answer» Correct Answer - D | |
| 610. |
Cyclic photophophorylation is confined toA. PS-IB. PS-IIC. Both (a) and (b)D. none of these |
| Answer» Correct Answer - A | |
| 611. |
Photosynthetically active radiation (PAR) represents the following range of wavelengthA. 340-450 nmB. 400-700nmC. 500-600nmD. 450-950 nm |
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Answer» Correct Answer - B Photosynthetic active radiation is the range of solar radiation , which is recived and absorbed by the plants , for the process of photosynthesis. It has a range of `400-700`nm. |
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| 612. |
In pigment system II, active chlorophyll isA. `P_(680)`B. `P_(830)`C. `P_(700)`D. `P_(673)` |
| Answer» Correct Answer - A | |
| 613. |
Cytochrome carries electrons on Fe-atom , whereasA. magnesiumB. copperC. mangeneseD. iron |
| Answer» Correct Answer - B | |
| 614. |
Among the products , mentioned below which of the following is product of cyclic phosphorylation ?A. Only `NADPH_2`B. `NADPH_2 and O_2`C. Only ATPD. None of these |
| Answer» Correct Answer - C | |
| 615. |
Products of light raction in photosynthesis areA. ATP and `NADPH_2`B. ADP and glucoseC. ferredoxin and cytochrome - `b_6`D. cytochromes |
| Answer» Correct Answer - A | |
| 616. |
In cyclic photophosphorylation, ATP is synthesized when electron passes fromA. ferredoxin to cytochrome `b_(6)`B. plastoquinone to cytochrome ƒC. ferredoxin to plastoquinone and cytochrome `b_(6)` to cytochrome ƒD. all the above are wrong |
| Answer» Correct Answer - C | |
| 617. |
Find out the mismatched pair .A. `C_4`-plants - Kranz anatomyB. Primary `CO_2` fixation product of `C_4`-plants - OAAC. Primary `CO_2`acceptor of `C_3`-plants - RuBPD. `C_3` -plants - Maize |
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Answer» Correct Answer - D The only mismathced pair in the options given is that of maize , which is a `C_3`-plant. Rest all are correctly mathced. As maize is a monocot plant. Which uses `C_4`-pathway to fix `CO_2` , it is considered as `C_4`-plant. |
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| 618. |
The products of light reaction areA. xanthophyll , NADHPH and oxygen.B. chlorophyll , ATP and NADPHC. ATP, NADPH and oxygenD. None of the above |
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Answer» Correct Answer - C The products of light reaction are ATP , NADPH and oxygen of which oxygen is released into the atmosphere , NADPH acts as reducing agent and ATP is consumed during the carbon dioxide fixation in dark reaction. |
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| 619. |
Assertion : Non - cyclic photophophorylation occurs in the stroma of chloroplasts. Reason : There is a continuous flow of electrons in this process.A. Both Assertion and Reason are true and Reason is the correct explanation of AsserationB. Both Assertion and Reason are true, but Reason is not the correct explanation of AssertionC. Assertion is true , but Reason is falseD. Assertion is false, but Reson is true |
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Answer» Correct Answer - D Non- cyclic photophorylation occurs in granum portion of chloroplast. It is an association of photosystem -I and II. In this process . Electrons continuously flow from water to PS-II to PS-I and to find electron acceptor ,i.e., NADP. In this process. ATP is formed from ADP and `O_2` is also evolved. |
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| 620. |
During non- cyclic photophosphorylation ATP molecules are produced through electron flowA. from `H_(2)O` to PS IIB. from PS II and PS IC. from PSI to NADPD. from PSI to ferredoxine |
| Answer» Correct Answer - B | |
| 621. |
The first electron acceptor in non- cyclic electron transfer isA. cytochrome-`b_(6)-f`B. plastocyaninC. NADPD. plastoquinone |
| Answer» Correct Answer - D | |
| 622. |
Which of the following statements regarding cyclic flow of electrons during light reactions is false ?A. This process takes palce in the stromal lamellaeB. ATP synthesis takes placeC. `NADPH+H^(+)` is synthesisedD. PS-II, is not involved in the process |
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Answer» Correct Answer - D Cyclic flow of light eaction is the process of photosynthesis , in which light of wavelength more than 680 nm (i.e.around 100nm) is required . It takes place in the stroma lamellae of the chloroplast. During cyclic photophosphorylation, synthesis of ATP takes place (i.e. not `NADPH+H^+`) because the stroma lamellae does not possess enzyme NADP reductase due to which the excited electrons in the cyclic flow do not pass onto NADP instead they get back to the PS-I complex only. |
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| 623. |
Which is not ture regarding cyclic electron transfer system (ETP) in thtylakoid membrane of higher plants ?A. Operates at low light intensityB. Only PSI is involvedC. Act as a back up for ATP synthesisD. External electron donor is required |
| Answer» Correct Answer - D | |
| 624. |
Primary carboxylation occurs in `C_(3)` and `C_(4)` plants with the help ofA. PEP carboxylase and pyruvate carboxylase respectivelyB. PEP carboxylase and RuBP carboxylase respectivelyC. RuBP carboxylase and pyruvate carboxylase respectively.D. |
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Answer» Correct Answer - C Primary carboxylation occurs in `C_(3) and C_(4)` plants with the help of RuBP carboxylase and PEP carboxylase respectively. |
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| 625. |
Name the part of chlorophyll, where electron rearrangement takes place when chlorophyll gets excitedA. Mg atomB. porphyrin ringC. phytol chainD. hydrocarbon |
| Answer» Correct Answer - B | |
| 626. |
The soure of `O_(2)` liberated in photosyntheisi in green plants isA. photosynthetic enzymeB. Carbohydrate present in leafC. WaterD. carbon dioxide |
| Answer» Correct Answer - C | |
| 627. |
Photocentres in higher plants areA. `P_(700)`B. `P_(680)`C. Both (a) and (b)D. chlorophyll -a |
| Answer» Correct Answer - C | |
| 628. |
Who found that the green parts in plants is where glucose is made, and that the glucose is usually stored as starch?A. Julius von SachsB. Cornelius van NielC. T.W. EngelmannD. Jan Ingenhousz |
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Answer» Correct Answer - A Mayer found that organic matter is synthesised with the help of solar energy .It was not until about 1854 that Julius von Sachs provided evidence for production of glucose when plants grow. .Sachs found that the green parts in plants is where glucose is formed and glucose is usually stored as starch. Glucose is not stored in plants as it increases the osmotic pressure. His later studies showed that the green substance in plants (chlorophyll as we know it now) is located in special bodies (later called chloroplasts) within plant cells. |
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| 629. |
Photoysis o fwater takes place inA. Calvin cycleB. GlycolysisC. Light phaseD. Dark phase |
| Answer» Correct Answer - D | |
| 630. |
Which is not a step in Calvin cycle ?A. CaboxylationB. ReductionC. PhotophosporylationD. Regeneration |
| Answer» Correct Answer - C | |
| 631. |
A bifuncitonal enzyme isA. Phosphoglycerate kinaseB. PEPCOC. RuBisCOD. Phosphoglyceraldehyde dehydrogenase |
| Answer» Correct Answer - C | |
| 632. |
The site of oxtgen devloution and photosyntheric phoshoryation in chlorplast areA. MatricxB. Grana stacksC. Inner wall of chloroplastD. Surface of choroplast |
| Answer» Correct Answer - B | |
| 633. |
A first action spectrum of photosynthesis was described by |
| Answer» Correct Answer - T.W> Engelmann | |
| 634. |
Production of glucose takes place in green part of plant is established by |
| Answer» Correct Answer - J.V. sachs | |
| 635. |
Which is not a step in Calvin cycle ?A. CarboxylationB. Glycolytic reversalC. RegenerationD. Photophosphorylation |
| Answer» Correct Answer - D | |
| 636. |
The photosynthetic unit having 250 chlorophyll molecules is calledA. photonB. quantasomeC. peroxysomeD. oxysome |
| Answer» Correct Answer - B | |
| 637. |
Name of the place where acculmulation of protons occur during chemiosmosis in chloroplast and mitochondria respectively. |
| Answer» Correct Answer - Thylakoid lumen and intermembrane space of mitochondria | |
| 638. |
Cyclic photophosphorylation releasesA. ATP and `NADPH_(2)`B. ATP , `NADPH_(2) ` and oxygenC. ATP onlyD. `NADPH_(2)` only |
| Answer» Correct Answer - C | |
| 639. |
Identify the A in the given figure of light reaction |
| Answer» Correct Answer - A-electron transport system | |
| 640. |
Cyclic photophosphorylation releasesA. ATP and NADP`H_(2)`B. ATP , ` NADPH_(2)` and oxygenC. ATP onlyD. `NADPH_(2)` only |
| Answer» Correct Answer - C | |
| 641. |
The absorption of radiant energy causesA. Reduction of chlorophyllB. Oxidation of chlorophyllC. Absorption of ` CO_(2)`D. Oxidation of `CO_(2)` |
| Answer» Correct Answer - B | |
| 642. |
which one of the following elements is required for photosynthesis oxygen evolutionA. CopperB. IronC. ManganeseD. Zinc |
| Answer» Correct Answer - C | |
| 643. |
Who was the first to explain the evolution of oxygen during photosynthesisA. DutrochetB. Joseph PriestleyC. V.HelmontD. Wilstatter |
| Answer» Correct Answer - B | |
| 644. |
There is double fixation of `CO_(2)` both in `C_(4)` and CAM plants. Which of the following statements brings out the main difference between the two ?A. Carboxylising enzymes are differentB. Fixation pathways are differentC. `CO_(2)` fixation in `C_(4)` plants is separated by space whereas in CAM plants, it is separated by timeD. The compensation point are different |
| Answer» Correct Answer - C | |
| 645. |
Stomatal movement is not affected byA. `CO_(2)` concentrationB. `O_(2)` concentrationC. LightD. Temperature |
| Answer» Correct Answer - B | |
| 646. |
The absorption spectrum of chlorophyllA. shows that some colours of light are absorbed more than the othersB. approximates the action spectrum of photosynthesisC. explains why chlorophyll is a green pigment.D. has all the above properties. |
| Answer» Correct Answer - B | |
| 647. |
During Hatch and stack pathway, PEP combines with `CO_(2)` in the presence of enzyme PEPCae, to form OA A. This process of initial fixation of `CO_(2)` occurs inA. mesophyll cellsB. bundle sheath cellsC. both a and bD. None of these |
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Answer» Correct Answer - A In `C_(4)` plants showing Hatch-slack cycle, intial fixation of `CO_(2)` occurs in mesophyll cell followed by final fixation in bundle sheath cells. |
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| 648. |
ATP is produced duringA. Cyclic photophosphorylationB. Non cyclic photosphosphorylationC. BothD. None |
| Answer» Correct Answer - C | |
| 649. |
Chloroplasts absorb light of wavelengthA. `200-300 m mu`B. `8700-1000 m mu`C. `460-660 m mu`D. `300-400m mu` |
| Answer» Correct Answer - A | |
| 650. |
Which of the following absorb light energy for photosynthesis : -A. ChlorophyllB. Water moleculeC. `O_(2)`D. RuBP |
| Answer» Correct Answer - A | |