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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.
| 101. |
Continuous supply of which carboxylic acid is required to run Krebs cycle uninterruptedly ?A. Succinyl CoAB. Malic acidC. Oxalosuccinic acidD. Oxaloacetic acid |
| Answer» Correct Answer - D | |
| 102. |
Sequence of organic acids in Krebs cycle isA. Citric acid `rarr` oxalosuccinic acid `rarr` isocitric acidB. Citric acid `rarr` isocitric acid `rarr` oxalosuccinic acidC. Isocitric acid `rarr` oxalosuccinic acid `rarr` citric acidD. Oxalosuccinic acid `rarr` isocitric acid `rarr` citric acid |
| Answer» Correct Answer - B | |
| 103. |
Assertion. There is no net exchange of gases at compensation point. Reason. Photosynthesis and respiration stop at compensation point.A. If both A and R are true and R is the correct explanation of A.B. If both A and R are true but R is not the correct explanation of A.C. If A is true but R is false.D. If both A and R are false. |
| Answer» Correct Answer - C | |
| 104. |
Continuous supply of which organic acid is required to run Krebs cycle uninterruptedly ?A. Succinyl CoAB. Malic acidC. Oxalosuccinic acidD. Oxaloacetic acid |
| Answer» Correct Answer - D | |
| 105. |
Give single chemical equation of photosynthesis. |
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Answer» The chemical equation of photosynthesis is given below: `6CO_(2) + 12H_(2)O overset("Light")underset("Chlorophyll") to (C_(6)H_(12)O_(6))+6O_(2)+6H_(2)O` |
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| 106. |
Choose correct option w.r.t. anaerobic respirationA. The first oxidation step occurs in mitochondriaB. All reactions occur in the cytoplasmC. They require oxygen only at one stepD. First step of reaction occur in cytoplasm then in mitochondria |
| Answer» Correct Answer - B | |
| 107. |
Name any two `C_(4)` plants. |
| Answer» Sugar cane and Maize. | |
| 108. |
Which is formed through phosphorylation in glycolysis?A. Fructose 1-6 BiphosphateB. DHA-3- phosphateC. Both are correctD. Glyceraldehyde-3-phosphate |
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Answer» Correct Answer - A Glucose on phosphorylation by ATP forms glucose 6-phosphate. It isomerises into fructose 6 phosphate which on further phosphorylation forms fructose 1, 6 biphosphate (previously called fructose 1, 6-Di phosphate). It cleaves to form two tautomers in dynamic equilibrium which are DHAP and PGAL. PGAL (= GAP) is further phosphorylated by `H_3PO_4` to form 1, 3 bi phosphoglyceric acid. |
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| 109. |
What is the basis for designating `C_(3)` and `C_(4)` pathways of photosynthesis ? |
| Answer» The number of carbon atoms contained in the first stable product of the pathway. | |
| 110. |
During photosynthesis oxygen in glucose comes fromA. `C_6H_12O_6`B. `O_2`C. `CO_2`D. both (1) and (2) |
| Answer» Correct Answer - B | |
| 111. |
Which enzyme of glycolysis is also called as pacemaker enzyme ?A. HexokinaseB. EnolaseC. PhosphofructokinaseD. Pyruvate kinase |
| Answer» Correct Answer - C | |
| 112. |
During glycolysis, enzyme involed in phosphorylation of hexose sugar isA. KinaseB. MutaseC. EnolaseD. Dehydrogenase |
| Answer» Correct Answer - A | |
| 113. |
Explain why photosynthesis is considered the most important process in the biosphere. |
| Answer» Photosynthesis is considered the most important process in the biosphere because (i) it is the only natural process that evolves molecular oxygen for use by other living organisms, ii) it consumes carbon dioxide which is being continuously added by the respiration of organisms and burning of organic fuels, and iii) it produces carbohydrates. | |
| 114. |
Out of the following, which is the rate limiting enzyme in glycolysis?A. Pyruvate kinaseB. Phosphofructo kinaseC. PhosphoglucoisomeraseD. Gluco kinase |
| Answer» Correct Answer - B | |
| 115. |
Which one is the most important limiting factor in photosynthesis? |
| Answer» Carbon dioxide. | |
| 116. |
Name two photosynthetic pigments belonging to carotenoids. |
| Answer» Crotene Xanthophyll. | |
| 117. |
In any case (aerobic or anaerobic), all living organisms retain the enzymatic machinery to partially oxidise glucose without the help of oxygen. This breakdown of glucose is calledA. GlycogenesisB. GlycogenolysisC. GlycolysisD. Gluconeogenesis |
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Answer» Correct Answer - C (C) In any case (aerobic or anaerobic) all living organisms retain the enzymatic machinery to partially oxidise glucose without the help of oxygen. This breakdown of glucose is called glycolysis. |
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| 118. |
Which of the following steps during glycolysis is associated with utilisation of ATP?A. Glucose `rarr` Glucose -6-phosphateB. Fructose-6-phosphate `rarr` Fructose-1,6-biphosphateC. PEP `rarr` Pyruvic acidD. Both (a) and (b) |
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Answer» Correct Answer - D In the initial phase (energy spendling phase) of glycolysis, the hexoses (i.e., glucose and fructose) ar phosphorylated in a reaction that uses ATP at two steps : First in the conversion of glucose into glucose-6-phosphate and second in the conversion of fructose-6-phophaste to fructose-1,6-biphosphate. These reactions are catalysed by the hexokinase and phospho-fructokinase respectively `"Glucose + ATP" underset(Mg^(2+))overset("hexokinase")(rarr) "Glucose-6-phosphate + ADP"` `"Fructose-6-phosphate + ATP" underset(Mg^(2+))overset("Phosphofructokinase")(rarr) "Fructose-1,6-biphosphate + ADP"` |
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| 119. |
All living organisms retain the enzymatic machinery to partially oxidise glucose without the help of oxygen. This breakdown of glucose to pyruvic acid is called. |
| Answer» Correct Answer - Glycolysis | |
| 120. |
The flow chart given below shows the steps in glycolysis. Select the option that correctly fills in the missing steps A,B,C and D. A. `{:(A,B,C,D),("Fructose-6-phosphate","Fructose-1-6-biphosphate",3-PGAL,1.3-"biphospho-glyceric acid"):}`B. `{:(A,B,C,D),("Fructose-1,6-biphosphate","3-PGAL",1.3-"biphospho-glyceric acid",):}`C. `{:(A,B,C,D),("3-PGA","1,3-biphospho-glyceric acid ",3-PGAL,"Fructose-1 ,6-biphosphate"):}`D. `{:(A,B,C,D),("Fructose-1,6-biphosphate","Fructose-6-phosphate",3-PGAL,"1,3-biphospho-glyceric acid"):}` |
| Answer» Correct Answer - A | |
| 121. |
The energy yield as a result of total oxidation of one glucose molecule during cellular respiration is to convertA. 38 molecules of ADP into 38 molecules of ATPB. 30 molecules of ADP into 30 molecules of ATPC. 36 molecules of ADP into 36 molecules of ATPD. 32 molecules of ADP into 32 molecules of ATP |
| Answer» Correct Answer - A | |
| 122. |
The following is a scheme showing the electron transport system. Identify the electron carrie molecules indicated as A and B. Choose the correct option. A. A = Fe-S protein , B = FMNB. A = FMN, B = Fe-S proteinC. A = coenzyme Q, B = cytochrome CD. A = cytochrome C, B = coenzyme Q |
| Answer» Correct Answer - C | |
| 123. |
Select the option that correctly fills the blanks in the following statements. A. Glucose has `ul((i))` carbon atoms, pyruvic acid has `ul((ii))` carbon atoms and the acetyl group has `ul((iii))`carbon atoms. B. Electrons enter the electron transport system as parts of hydrogen atoms attached to `ul((i))` and `ul((ii))`.A. `{:(" "A," "B),((i)-6(ii)-4(iii)-3,(i)-NADH(ii)-FADH_(2)):}`B. `{:(" "A," "B),((i)-6(ii)-3(iii)-2,(i)-NADH(ii)-FADH_(2)):}`C. `{:(" "A," "B),((i)-6(ii)-3(iii)-2,(i)-ATP (ii)-GTP):}`D. `{:(" "A," "B),((i)-6(ii)-4(iii)-3,(i)-ATP(ii)-GTP):}` |
| Answer» Correct Answer - b | |
| 124. |
Refer to the following flow chart representing the cellular respiration and its fuels. Blanks 1,2,3,4,5,6 and 7 are respectively A. amino acids, carbohydrate, glucose, fats, glycerol, fatty acid, acetyl Co-AB. fats, acetyl Co-A amino acid, fatty acid, carbohydrate, glycerol, glucoseC. fatty acid, glucose, acetyl Co-A glycerol, fats, carbohydrate, amino acidD. carbohydrate, fats, glycerol, fatty acids, amino acid, glycose, acetyl Co-A |
| Answer» Correct Answer - a | |
| 125. |
Fill in the blanks: 1. ATP synthase consists of two major components, `F_(o)" and "F_(1)`. The .... a... headpiece is peripheral membrane protein complex and contains the site for synthesis of ATP from ADP and inorganic phosphate. 2. ... b... is an integral membrane protein complex that forms the channel through which proton crosses the membrane. 3. For each ATP produced, .... c .... passes through .... b.... from the .... d.... to the .... e.... down the electrochemical proton gradient.A. `a-F_(0) , b-F_(1), c-3H^(+)`, d-matrix, c-inner membraneB. `a-F_(1) , b-F_(0), c-2H^(+)`, d-intermembrane space, e-matrixC. `a-F_(0), b-F_(1), c-2H^(+)`, d-intermembrane space, e-matrixD. `a-F_(1), b-F_(0),c-2H^(+)`, d-matrix,e-intermembrane space |
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Answer» Correct Answer - B (B) 1. ATP synthase consists of two major components, `F_(0)" and "F_(1)`. The `F_(1)` headpiece is peripheral membrane pro- tein complex and contains the site for synthesis of ATP from ADP and inorganic phosphate. 2. `F_(0)` is an integral membrane protein complex that forms the channel through which proton crosses the membrane. 3. For each ATP produced, `2H^(+)` passes through `F_(0)` from the intermembrane space to the matrix down the elec- trochemical proton gradient |
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| 126. |
In which of the following option correct words for all the three blanks A, B and C are indicated |
| Answer» Correct Answer - D | |
| 127. |
Read the following four statement A,B,C and D and select the right opition having both correct statements. statements (a) Z scheme of light raction takes place in presence of PS I only . (B ) Omly PS I is functional in cyclic photosporylation (c ) Cyclic photophosphorylation results into synthesis of ATP and `NADPH_(2)` (D ) Stroma lamllae lack PSII as welll as NADPA. B and CB. A and BC. B and DD. C and D |
| Answer» Correct Answer - C | |
| 128. |
Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using the following options.A. Both process can happen together because the diffusion coefficient of water and `CO_(2)` is different.B. The above processes happen only during night time.C. One process occurs during day time, and the other at night.D. Both processes cannot happen simultaneously. |
| Answer» Correct Answer - A | |
| 129. |
The production of ATP by oxidative phosphorylation is driven by energy fromA. coenzyme AB. cytochromesC. formation of NADHD. diffusion of protons from inter membrane space to the matrix of mitochondrion |
| Answer» Correct Answer - D | |
| 130. |
The rate of oxidative phosphorylation and ATP synthesis is related withA. quantasomesB. ribosomesC. elementary particlesD. lysosomes |
| Answer» Correct Answer - C | |
| 131. |
Asserotion: `C_(4)` photosynthetic pathway is more efficient than the `C_(3)` pathway. Reson : Photorespirationis suppressed in `C_(4)` plants.A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.C. If Assertion and Reason are true but Reason is not a correct explanation of the Assertion.D. If Assertion is true but the Reason is false. |
| Answer» Correct Answer - B | |
| 132. |
ATP is synthesized inA. Ion channelsB. PlasmalemmaC. `F_(0)` particlesD. `F_(1)` particles |
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Answer» Correct Answer - D (D) ATP is synthesized in `F_(1)` particles of ATP synthase. |
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| 133. |
Assertion: Plants possessing `C_(4)`- pathway of carbon fixation have a higher net primary productively than the `C_(3)`-pathway possessing plants. Reason: For each unit weight of fixed carbon, `C_(4)`-pathway possessing plants require less water than `C_(3)` pathway possessing plants. Reason: For each unit weight of fixed carbon, `C_(4)`-pathway possessing plants require less water than the `C_(3)`- pathway possesing plants.A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.C. If Assertion and Reason are true but Reason is not a correct explanation of the Assertion.D. If Assertion is true but the Reason is false. |
| Answer» Correct Answer - B | |
| 134. |
Calvin cycle isA. Reductive carboxylationB. Oxidative carboxylationC. ReductionD. Oxidation |
| Answer» Correct Answer - A | |
| 135. |
Calvin cycle leads to reducion ofA. `CO_(2)`B. `O_(2)`C. RUBPD. RUMP |
| Answer» Correct Answer - A | |
| 136. |
Which compound dontates hydrogen to carbohydrates in Calvin cycle? |
| Answer» Correct Answer - NADPH | |
| 137. |
The first stable product in `C_(4)` pathway is |
| Answer» Oxalo acetic acid. | |
| 138. |
The correct sequence of cell organelles during photorespiration isA. Chloroplast,-Golgibodies, -mitochondriaB. Chloroplast,-RoughEndoplasmic reticulum, Dictymosomes.C. Chloroplast,-mitochondria,-peroxisomeD. Chloroplast, -vacuole,-peroxisome |
| Answer» Correct Answer - C | |
| 139. |
Assertion : In alcoholic fermentaion, the hexose molecule is converted into glucose asnd fructose. Reason : Alcoholic fermentatioin is anaerobic respiration brough about by enzyme zymase. |
| Answer» Alcoholic fementation is the respiration in absence of `O_(2)`. In this process, hexose molecule is changed to ehtyl alcohol and `CO_(2)`. In presence of zymase enzyme. In this less amount of energy is released as compared to ethyl alcohol and `CO_(2)`. in presence of zymase enzyme in this less amount of energy is released as compared to aerobic respiration. | |
| 140. |
Assertion: In electron transport chain, there is a gain of energy at each step. Reason : At each step of EtC, there are electron carriers. |
| Answer» The passage of electrons from one enzyme or cytochrome to the need is a downhill journey with a loss of energy at each step. At each step the electron camers include flavins, iron sulphur complexes, quinones and cyclohromes. | |
| 141. |
Common pathways of aerobic and anaerobic respiration isA. EMP pathwayB. Tricarboxylic acid cycleC. Acetyl CoA formationD. Citric acid cycle |
| Answer» Correct Answer - A | |
| 142. |
Which intermediate product is found in all three of the following process (a) anaerobic respiration (b) aerobic respiration (c) photosynthesisA. succinic acidB. lactic acidC. Ri bulose diphosphateD. Phosphoglyceric acid |
| Answer» Correct Answer - D | |
| 143. |
Assertion: Glycolysis occurs in cytoplasm. Reason: Enzymes for glycolysis are found in cytoplasm. It is common in aerobic/anaerobic respiration. |
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Answer» Correct Answer - A Glycolysis occurs in cytoplasm as all necessary enzymes are found in it. This process is common in aerobic/anaerobic respiration. In this process. One glucose molecule is converted into 2 molecules of pyruvic acid. |
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| 144. |
Assertion: Glycolysis occurs in cytoplasm. Reason: Enzymes for glycolysis are found in cytoplasm. It is common in aerobic/anaerobic respiration.A. If both assertion and reason are true and the reason is a correct explanation of the assertion.B. If both assertion and reason are true but reason is not a correct explanation of the assertionC. If the assertion is true but reason is false.D. If both the assertion and reason are false. |
| Answer» Correct Answer - A | |
| 145. |
Assertion: Under aerobic conditions, pyruvate gives rise to lactate. Reason: Under anaerobic condition, pyruvate gives rise to acetyl CoA. |
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Answer» Correct Answer - D Under aerobic conditions the products are pyruvate and coenzyme NADH. Pyruvate directly enters the mitochondrial matrix and is converted into acetyl-CoA. Under anaerobic conditions. Pyruvate is used as a hydrogen acceptor and converted into. Lactate. In anaerobic conditions, pyruvate remains in the cytosol. |
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| 146. |
Assertion :- Succinyl CoA is the precursor of pyrrole group containing compounds. Reason :- Succinyl CoA is an intermediate of TCA cycle.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 | |
| 147. |
Assertion :- Succinyl CoA is the precursor of pyrrole group containing compounds. Reason :- Succinyl CoA is an intermediate of TCA cycle.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 the Reason is not the correct explanation of the Assertion.C. If Assertion is true, but Reason is flase.D. If both Assertion and Reason are false. |
| Answer» Correct Answer - B | |
| 148. |
What is active glucoseA. NAD-glucoseB. PhosphoglucoseC. GlycerophosphateD. |
| Answer» Correct Answer - C | |
| 149. |
Assertion: Terminal oxidation occurs both in aerobic and anaerobic condtions. Reason: Terminal oxidation occurs at terminal step of respiration. |
| Answer» Terminal oxidation is the name of oxidation found in aerobic respiration that occurs towards the end of catabloic process and involves the passage of both electrons and protons of reduced coenzymes to oxygen. | |
| 150. |
Consider the following: 1. Succinate 2. Succinyl CoA 3. `NADH + H^+` 4. `CO_2` When `alpha`-ketoglutarate dehydrogenase enzyme acts on `alpha`-ketoglutarate, which of the above are produced?A. 1 and 2 onlyB. 1 and 3 onlyC. 1, 3 and 4D. 2, 3 and 4 |
| Answer» Correct Answer - D | |