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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. |
In alcoholic fermentationA. Triose phosphate is electron donor while acetaldehyde is electron acceptorB. Triose phosphate is electron donor while pyruvic acid is electron acceptorC. There is no electron donorD. Oxygen is electron acceptor |
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Answer» Correct Answer - A (A) In alcoholic fermentation triose phosphate is electron donor while acetaldehyde is electron acceptor. |
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| 602. |
During the process of acerobic respiration `ul((i))` gets oxidised and its electrons get transferred to the electron transport chain while in photosyntheis, `ul((ii))` gets oxidised to transfer molecules to the electron transport chain.A. (i)-glucose, (ii)-xanthophyllB. (i)-carbon dioxide, (ii)-xanthophyllC. (i)-carbon dioxide, (ii)-chlorophyll-aD. (i)-glucose, (ii)-chlorophyll-a |
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Answer» Correct Answer - D The oxidative breakdown of respiratory substrates with the help of atmospheric `O_(2)` is known as aerobic respiration. In involves complete breakdown of substrates into `CO_(2)` and water, releasing energy. For example, the simple chemical equation for aerobic breakdown of glucose is `C_(6)H_(12)O_(6)+6O_(2)rarr6CO_(2)+6H_(2)O+3870 kJ//686 KCal` When during photosynthesis chlorophyll a gets oxidised to transfer molecules to the electron transport chain. |
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| 603. |
Name the 10-step pathway which occurs in all living organisms (aerobes and anaerobes) without without the help of oxygen. In which part of the cell does it occur ? |
| Answer» Glycolysis or EMP Pathway. It occurs in cytosol of the cell. | |
| 604. |
TCA cycle starts with the condensation of acetyl group with (A) _____ (B)_____ to yield citric acid. |
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Answer» Correct Answer - A-oxaloacetic acid B-water |
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| 605. |
Pyruvic acid before combining with the oxaloacetic acid of Krebs cycle becomesA. Citric acidB. Acetoacetic acidC. Cis-aconitic acidD. Acetyl CoA |
| Answer» Correct Answer - D | |
| 606. |
Pyruvic acid is converted into a compound before formation of oxaloacetic acid in the citric acid cycle, this compound is Or Which of the following metabolites enter the TCA cycle during glucose oxidation.A. Acetyl CoAB. Accetoacetic acidC. Lactic acidD. cis aconitic acid |
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Answer» Correct Answer - A Under aerobic condition pyruvate is converted into acetyl co-enzyme-A and `CO_(2)` is released. Acetyl co-enzyme-A combines with oxaloacetic acid and form citric acid. |
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| 607. |
Aerobic respiration is obtained fromA. AuxinB. SugarC. EnzymeD. Kinetin |
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Answer» Correct Answer - C Cellular respiration is an enzyme controlled process of biological oxidation of food materilas in living cell. |
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| 608. |
Alcoholic fermentation occurs in the presence ofA. ZymaseB. AmylaseC. InvertaseD. Maltase |
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Answer» Correct Answer - A (A) Alcoholic fermentation occurs in the presence of zymase. |
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| 609. |
Carbon dioxide is liberated duringA. PhotosynthesisB. RespirationC. TranspirationD. Ascent of sap |
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Answer» Correct Answer - B (B) Carbon dioxide is liberated during respiration. |
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| 610. |
Assertion : The first step in TCA cycle is the condensation of pyruvate with oxaloacetic acid and water. Reason : This reaction is catalysed by enzyme pyruvate synthase.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
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Answer» Correct Answer - d The TCA cycle starts with the condensation of acetyl group with oxaloacetic acid (OAA) and water to yield citric acid. The reaction is catalysed by the enzyme citrate synthetase and a molecule of CoA is released. Acetyl `CoA + OA A + H_(2)O underset("synthetase")overset("Citrate")(rarr) " Citrate " + CoA` |
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| 611. |
Though vertebrates are aerobes, but their `ul((i))` show anaerobic respiration during `ul((iii))`. During this `ul((iii))` of skeletal muscle fibres is broken down to release lactic acid and energy. Lactic acid, if accumulates causes muscle fatigue. Fill up the blanks in the above paragraph and select the correct option.A. `{:((i),(ii),(iii).),("skeletal muscles","heavy exercise","glycose"):}`B. `{:((i),(ii),(iii).),("skeletal muscles","mild exercise","glycogen"):}`C. `{:((i),(ii),(iii).),("skeletal muscles","heavy exercise","glycogen"):}`D. `{:((i),(ii),(iii).),("cardiac muscles","heavy exercise","glycogen"):}` |
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Answer» Correct Answer - A Muscle fatigue is the reduction in force of contraction of a muscle after prolonged stimulation. In the absence of oxygen, skeletal muscle of human beings can contract for a short time, but it gets fatigued soon. This is due to the fact that in the absence of oxygen, products of glycolysis mainly lactic acid is not disposed off and accumulates in the muscles. This leads to muscle fatigue and pain in the muscles. A muscle gets fatigued sooner after a strenuous exercise than after a mild exercise. Faster breathing for sometime after s strenuous exercise supplies extra oxygen, disposes off excess lactic acids and muscle fatigue disappears. |
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| 612. |
Different steps in respiratioin are controlled byA. AuxinB. SugarC. EnymeD. Kinetin |
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Answer» Correct Answer - D As 300 ppm is normal concentration of `CO_(2)`, hence there is no effect on plant. |
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| 613. |
Respiration is which type of process ?A. CataboilcB. Metabolic C. AnabolicD. None |
| Answer» Correct Answer - A | |
| 614. |
In animal cells, like muscles during exercise, when oxygen is inadequate for cellular respiration pyruvic acid is reduced to lactic acid byA. Lactate decarboxylaseB. Pyruvate dehydrogenaseC. Both A and BD. Lactate dehydrogenase |
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Answer» Correct Answer - D (D) In animal cells, like muscles during exercise, when oxygen is inadequate for cellular respiration pyruvic acid is reduced to lactic acid by lactate dehydroge- nase. |
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| 615. |
How many ATP molecules are released when one molecules of glucose is oxidised in our liver cells ?A. 36B. 38C. 2D. 8 |
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Answer» Correct Answer - B (B) 38 ATP molecules are released when one molecule of glucose is oxidised in our liver cells. |
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| 616. |
The energy releasing process in which the substrate is oxidised without an external acceptor is called or Lactic acid converted into alcohol in process calledA. Aerobic respirationB. GlycolysisC. FermentationD. Photorespiration |
| Answer» Correct Answer - C | |
| 617. |
Assertion : Anaerobic respiration sometimes occurs in our skeletal muscles during strenous exercise. Reason : Pyruvic acid is reduced to lactic acid by lactate dehydrogenase in the absence of oxygen.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
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Answer» Correct Answer - a In human body, anaerobic respiration occurs in our skeletal muscles during exercise. In muscles during strenuous exercise, when oxygen is inadequate for cellular respiration. Pyruvic acid is reduced to lactic acid by lactate debydrogenase. The reducing agent is `NADA + H^(+)` which is reoxidised to `NAD^(+)`. |
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| 618. |
In anaerobic respiration, pyruvic acid in muscles formsA. ATPB. Lactic acidC. Acetyl Co- AD. NAD |
| Answer» Correct Answer - B | |
| 619. |
Cramps are formed during vigrous exercise, it is due to production of ____ in muscles.A. Acetyl coenzyme AB. Ethyl alcoholC. Lactic acidD. Acetic acid |
| Answer» Correct Answer - C | |
| 620. |
A : Fermentation stops when alcohol in sugar solution is about 13%. R : Saccharomyces cerevisiae are killed and zymase in not formed.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)C. If Assertion is true statement but Reason is false, then mark (3)D. If both Assertion and Reason are false statements, then mark (4) |
| Answer» Correct Answer - A | |
| 621. |
A : In PPP (HMS), complete oxidation of one glucose molecule would produce `6CO_(2)` molecules and `12 NADPH_(2)` moleucles. R : It occurs in cytoplasm and chloroplast, in presence of `O_(2)`.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)C. If Assertion is true statement but Reason is false, then mark (3)D. If both Assertion and Reason are false statements, then mark (4) |
| Answer» Correct Answer - B | |
| 622. |
During oxidation energy released in a series of slow stepwise reaction controlled by (A)____ and is trapped as (B)____ in the form of (C)____ |
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Answer» Correct Answer - A-enzymes B-chemical energy C-ATP |
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| 623. |
Respiration is which type of process ?A. CataboilcB. MetabolicC. AnabolicD. None |
| Answer» Correct Answer - A | |
| 624. |
How many ATP molecules are obtained from fermentation of 1 molecule of glucoseA. 2B. 4C. 3D. 5 |
| Answer» Correct Answer - A | |
| 625. |
In muscles during exercise, when oxygen is inadequate for cellular respiration pyruvic acid is reduced toA. Acetyl coenzyme AB. Ethyl alcoholC. Lactic acidD. Acetic acid |
| Answer» Correct Answer - C | |
| 626. |
In alcohol fermentation, ______ of energy in glucose is released and not all of it is trapped as high energy bonds of ATP.A. Less than 1%B. More than 10%C. Less than 7%D. More than 40% |
| Answer» Correct Answer - C | |
| 627. |
In PPP, the net gain of ATP molecules for one glucose molecule isA. 34 ATPsB. 35 ATPsC. 36 ATPsD. 38 ATPs |
| Answer» Correct Answer - B | |
| 628. |
How many ATP are used in glycolysis or for complete phosphoylatin of a glucose molecule, how many ATP molecules are required Or The net again of ATP during glycolysis isA. 4B. 2C. 6D. 8 |
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Answer» Correct Answer - B Two molecules of ATP are consumed in glycolysis during phosphorylation of glucose to fructose 1,6-diphosphate. |
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| 629. |
In anaerobic respiratin, from one glucose molecule how many net ATP molecules are formed.A. 2B. 4C. 6D. 4 |
| Answer» Correct Answer - D | |
| 630. |
5C intermediate molecule in TCA cycle isA. Citric acidB. Succinyl CoAC. `alpha`-ketoglutaric acidD. Fumaric acid |
| Answer» Correct Answer - C | |
| 631. |
Net gain of ATP molecules of each molecule of glucose in fermentation isA. 8B. 10C. 4D. 2 |
| Answer» Correct Answer - D | |
| 632. |
The last or terminal cytochrome in respiratory chain is or In an electron transport chain in terminal oxidation the cytochrome which donates electrons to `O_(2)` isA. Cyt bB. Cyt `a_(3)`C. Cyt aD. Cyt c |
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Answer» Correct Answer - B Cytochrome `alpha_(3)` is terminal cytochrome of ETC. it has `Fe^(+++)` and `Cu^(++)` both. With `Fe^(+++)`, it picks up electrons and through `Cu^(+)` it passes electrons to oxygen. |
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| 633. |
Substrate level phosphorylation does not occur in which of the following reaction of aerobic respiration ?A. 1,3-diPGA `to` 3-PGAB. 3-PGA `to` 2-PGAC. PEP `to` PyruvateD. Succinyl CoA `to` Succinic acid |
| Answer» Correct Answer - B | |
| 634. |
Which of the following is high energy molecule produced by oxidative decarboxylation in aerobic respiration but is neither the intermediate of TCA nor EMP ?A. `NADH+H^(+)`B. ATPC. Acetyl CoAD. Succinyl CoA |
| Answer» Correct Answer - C | |
| 635. |
Firstg reaction in pentose phosphate pathway isA. Oxidation of glucose-6-phosphateB. 6-phospogluconic acidC. Ribose-5-phosphateD. Fructose-5-phosphate |
| Answer» Correct Answer - A | |
| 636. |
Assertion: The reduced ubiquinone (ubiquinol) is oxidised with the transfer of electron to cytochrome c. Reason: During electron transport, proton accumulates within inner membrane of mitochondria.A. If both. assertion and reason are true and the reason is 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 - C (C) The reduced ubiquinone (ubiquinol) is oxidised with the transfer of electron to cytochrome c. During electron transport proton accumulates within inter membrane space of mitochondria. |
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| 637. |
First oxidative decarboxylation during aerobic respiration occur inA. cytoplasmB. mitochondrial inner spacC. mitochondrial outer spaceD. mitochondrial matrix. |
| Answer» Correct Answer - D | |
| 638. |
In the electron transport system, the reduced coenzymes are regenerated byA. Loss of hydrogenB. Loss of electronC. Additin of oxygenD. None of the above |
| Answer» Correct Answer - B | |
| 639. |
One mole of glucose on complete oxidation in aerobic respiration yields ?A. 2870 KJB. 5000 KJC. 686 KJD. 1870 KJ |
| Answer» Correct Answer - A | |
| 640. |
ATP molecules produced respectively by NADH`(H^(+)` and FAD`H_(2)` during electron transport areA. 3 and 2B. 1 and 1C. 2 and 3D. 3 and 3 |
| Answer» Correct Answer - A | |
| 641. |
In the electron transport system present in the inner mitochondrial membrane, complexes I and IV are respectively.A. NADH dehydrogenase and FAD`H_(2)`B. FAD`H_(2)` and NADH dehydrogenaseC. NADH dehydrogenase and cytochrome oxidase complexD. NADH dehydrogenase and ATP synthase |
| Answer» Correct Answer - C | |
| 642. |
Oxidation of one molecule of glucose in aerobic respiration results in prodution ofA. 36 ATP moleculesB. 38 ATP moleculesC. 3 ATP moleculesD. 15 ATP molecules |
| Answer» Correct Answer - B | |
| 643. |
Electron transport system occurs inA. Outer membrane of mitochondriaB. Cristae of mitochondriaC. Matrix of mitochondriaD. Oxysomes |
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Answer» Correct Answer - B (B) Electron transport system occurs in cristae (or inner membrane) of mitochondria. |
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| 644. |
In aerobic respiration one glucose producesA. `8 NADH + 2 FADH_(2) + 2ATP`B. `12 NADH + 2 FADH_(2) + 38 ATP`C. `12 NADH + 30 ATP+ H_(2)0 `D. `10 NADH + 2 FADH_(2) + 2ATP + 2 GTP` |
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Answer» Correct Answer - D (D) In aerobic respiration one glucose produces 10 NADH + 2 `FADH_(2)` + 2ATP + 2 GTP. |
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| 645. |
Apparatus to measure rate of respiration and R.Q. isA. AuxanometerB. PotometerC. RespirometerD. Manometer |
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Answer» Correct Answer - C (C) Apparatus to measure rate of respiration and R.Q is respirometer. |
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| 646. |
Respirometer is an instrument used to measureA. rate of respirationB. respiratory quotientC. both of theseD. none of these |
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Answer» Correct Answer - c Respirometer is an instrument used for measuring rate of respiration and respiratory quotient. |
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| 647. |
The product of aerobic glycolysis in skeletal muscle and anaerobic fermontation in yeast are respectively ........... and ......... . |
| Answer» Correct Answer - lactic acid, ethanol. | |
| 648. |
What are the assumptions made during the calculation of net gain of ATP? |
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Answer» For theoretical calculation of ATP molecules, various assumptions are made, which are as follows. (a) It is assumed that various parts of aerobic respiration such as glycolysis, TCA cycle, and ETS occur in a sequential and orderly pathway. (b) NADH produced during the process of glycolysis enters into mitochondria to undergo oxidative phosphorylation. (c) Glucose molecule is assumed to be the only substrate while it is assumed that no other molecule enters the pathway at intermediate stages. (d) The intermediates produced during respiration are not utilized in any other process. |
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| 649. |
When a plant is girdled (ringed),which part dies first-the root or the shoot? |
| Answer» roots die first. | |
| 650. |
Common immediate source of energy in cellular activity or Energy currency of the cell is Or To a living organism which of the following has the greater amount of availale energy per moleculeA. DNAB. ATPC. RNAD. NAD |
| Answer» Correct Answer - B | |