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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.
| 151. |
NADH is oxidised to `NAD^(+)` inA. Aerobic respirationB. EMP pathwayC. FermentationD. More than one option is correct |
| Answer» Correct Answer - D | |
| 152. |
NADH is oxidised to `NAD^(+)` rather slowly in fermentation, however the reaction is very vigorous in case of aerobic respiration |
| Answer» Correct Answer - 1 | |
| 153. |
Number of ATP produced from one pyruvic acid during conversion to acetyl CoA isA. 3B. 5C. 8D. 15 |
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Answer» Correct Answer - A (A) Number of ATP produced from one pyruvic acid dur- ing conversion to acetyl CoA is 3. |
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| 154. |
Identify A and B in the given reaction. Pyruvic acid `+CoA + NAD^(+) overset(Mg^(2+))underset("Pyruvate dehydrogenase")rarr A+B +NADH +H^(+)`A. `{:(A,B),(PEP,CO_(2)):}`B. `{:(A,B),("Acetyl" CoA,CO_(2)):}`C. `{:(A,B),(CO_(2),H_(2)O):}`D. `{:(A,B),("Acetyl" CoA,H_(2)O):}` |
| Answer» Correct Answer - B | |
| 155. |
Write the enzyme & its coenzymes which catalyse the following reaction:- Pyruvic acid `+NAD^(+)to"ACetylCoA"+CO_2+NADH` |
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Answer» Correct Answer - Pyruvate dehydrogenase `NDA^(+),CoA | |
| 156. |
The formation of Acetyl CoA from pyruvic acid is the result of itsA. ReductionB. DehydrationC. PhosphorylationD. Oxidative decarboxylation |
| Answer» Correct Answer - D | |
| 157. |
Number of acetyl CoA formed from one molecule of glucose isA. 1B. 2C. 4D. 6 |
| Answer» Correct Answer - B | |
| 158. |
Which enzyme is required for the following conversion ? Pyruvic acid `+CoA+NAD^(+) to "Acetyl" CoA+CO_(2)+NADH+H^(+)`A. Pyruvate dehydrogenaseB. PhosphoglucomutaseC. Pyruvate oxidaseD. Pyruvate carboxylase |
| Answer» Correct Answer - A | |
| 159. |
During the conversion of pyruvic acid into acetyl CoA, pyruvic acid isA. OxidizedB. ReducedC. IsomerizedD. Condensed |
| Answer» Correct Answer - A | |
| 160. |
Assertion : Respiratory pathway is an amphibolic pathway. Reason : In respiration, there is breakdown of many substances (catabolism) and synthesis of many substances (anabolism) by respiratory intermediates.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 |
| Answer» Correct Answer - a | |
| 161. |
FAD is electron acceptor during oxidation ofA. `alpha`-Kctoglutaratc `rarr` Succinyl CoAB. Succinic acid `rarr` Fumaric acidC. Succinyl CoA `rarr` Succinic acidD. Fumaric acid `rarr` Malic acid |
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Answer» Correct Answer - B (B) FAD is electron acceptor during oxidation of Succinic acid `rarr` Fumaric acid. |
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| 162. |
Which one of the following enzymes of respiratory pathway has the coenzyme FAD hnked with it?A. Citric acid synthetaseB. FumeraseC. Succinic acid dehydrogenaseD. |
| Answer» Correct Answer - D | |
| 163. |
FAD acts as an electron acceptor is betweenA. fumaric acid and malic acidB. succinic and fumaric acidC. malic acid and oxaloacetic acidD. citric and isocitric acid |
| Answer» Correct Answer - B | |
| 164. |
All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in the inner mitochondrial membrane in eukaryotes and in cyosol in prokaryotes. This enzyme isA. Succinate dehydrogenaseB. Lactate dehydrogenaseC. Isocitrate dehydrogenaseD. Malate dehydrogenase |
| Answer» Correct Answer - A | |
| 165. |
Assertion : ATP acts as the energy currency of the cell. Reason : ATP can be broken down to release energy wherever and whenever energy needs to be utilised.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 Cellular respiration is the mechanism of breakdown of food masterials within the cell to release energy, and the trapping of this energy for synthesis of ATP. The energy released by oxidation in respiration is not used directly but is used to synthesise ATP, which is broken down whenever and wherever energy needs to be utilised. Hence, ATP acts as the energy currency of the cell. This energy trapped in ATP is utilised in various energy - requiring processes of the organisms. |
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| 166. |
In Beta oxidation, ATPs are producedA. Flavin & Acetyl CoAB. Fatty acidC. NADHD. `NAD^+` |
| Answer» Correct Answer - B | |
| 167. |
The mechanism of breakdown of food materials within the cell to release energy and the trapping of this energy for synthesis of ATP is calledA. FermentationB. GlycolysisC. Cellular respirationD. Breathing |
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Answer» Correct Answer - C (C) The mechanism of breakdown of food materials within the cell to release energy and the trapping of this energy for synthesis of ATP is culled cellular res- piration. |
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| 168. |
(a) NADP reductase enzymes is located on …….. (b) Breakdown of proton gradient leads to release of ……. |
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Answer» a) grana-lamellate. b) energy. |
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| 169. |
The breaking of C-C bonds of complex compounds through oxidation within the cells, leading to release of considerable amount of energy is calledA. MetabolismB. RespirationC. BreathingD. Fermentation |
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Answer» Correct Answer - B (B) The breaking of C-C bonds of complex compounds through oxidation within the cells, leading to release of considerable amount of energy is called respiration |
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| 170. |
Name the site(s) where breakdown of complex molecules takes palce to yield energy |
| Answer» Correct Answer - Cytoplasm & Mitochondria | |
| 171. |
How many ATPs are produced during the glycolysis of one molecule of glucose ?A. 4B. 2C. 36D. 38 |
| Answer» Correct Answer - B | |
| 172. |
Respiration involves breaking of _____ bonds of complex compounds through oxidation within the cells, leading to release of considerable amount of energy.A. C-CB. C-OC. C-HD. Both (2) & (3) |
| Answer» Correct Answer - A | |
| 173. |
Which of the following will release more energy on oxidation ? Arrange them in ascending order. (a) 1 gm of fat (b) 1 gm of protein (c) 1 gm of glucose (d) 0.5 gm of glucose + 0.5 g glucose. |
| Answer» Correct Answer - (b) (a) (d) and (c) . | |
| 174. |
The breakdown of the C-C bonds of complex compounds through oxidation within the cells, leading to release of considerable amount of energy is called. |
| Answer» Correct Answer - Respiration | |
| 175. |
In prokaryotic cells, the number of ATPs genrated from one glucose molecule isA. 36B. 38C. 34D. 32 |
| Answer» Correct Answer - B | |
| 176. |
Which of the following substances can undergo oxidation and release energy ?A. Inorganic acidsB. Organic foodC. Organic acidD. Both (2) & (3) |
| Answer» Correct Answer - D | |
| 177. |
In floating respiration substrate used is/areA. Carbohydrate onlyB. Fat and carbohydrateC. Fat and proteinD. Carbohydrate and protein |
| Answer» Correct Answer - B | |
| 178. |
Mark the incorrect statement.A. Breaking of C-C bonds of complex organic molecules by oxidation cells leading to the release of a lot of energy is called cellular respirationB. initial stage of cellular respiration takes place in cytoplasmC. Incomplete oxidation of pyruvate by the stepwise removal of all the hydrogen atoms, leaving three molecules of `CO_(2)`D. TCA cycle starts with the condensation of acetyl group with OAA and `H_(2)O` to yield citric acid |
| Answer» Correct Answer - C | |
| 179. |
Choose the incorrect option for why plants can get along without respiratory organs as plants, unlike animals, have no specialized organs for gaseous exchange.A. Respiration rate is faster than animals in roots, stems and leavesB. `O_(2)` released during photosynthesis is utilized for respirationC. Loose packing of parenchyma cells in leaves, stems and roots facilitates respirationD. There is very little transport of gases from one plant part to another |
| Answer» Correct Answer - A | |
| 180. |
Which of these statements is incorrect.A. Enzymes of TCA cycle are present in mitochondrial matrixB. Glycolysis occurs in cytosolC. Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atomsD. Oxidative phosphorylation takes place in outer mitochondrial membrane |
| Answer» Correct Answer - D | |
| 181. |
Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteinsA. Pyruvic acidB. Acetyl CoAC. Glucose - 6 -phosphateD. Fructose 1, 6 - bisphosphate |
| Answer» Correct Answer - B | |
| 182. |
Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteinsA. Glucose-6-phosphateB. Fructose 1,6-bisphosphateC. Pyruvic acidD. Acetyl Co-A |
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Answer» Correct Answer - D Acetyl Co-A is common to respiration mediated breakdown of fats, carbohydrates and proteins Glucose and fructose are phosphorylated to give rise to glucose-6-phosphate by the activity of the enzyme hexokinase.Glucose-6-phosphate is then converted into fructose-6-phosphaste adn purther to fructose 1-6-bisphosphate. Pyruvic acid is the end product of glycolysis. |
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| 183. |
Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteinsA. Glucose-6-phosphateB. Fructose 1, 6-bisphosphateC. Pyruvic acidD. Acetyl CoA |
| Answer» Correct Answer - D | |
| 184. |
Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteinsA. Acetyl CoAB. Glucose-6-phosphateC. Fructose 1, 6-bisphosphateD. Pyruvic acid |
| Answer» Correct Answer - A | |
| 185. |
Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins ?A. Glucose-6-phosphateB. Fructose 1, 6-bisphosphateC. Pyruvic acidD. Acetly CoA |
| Answer» Correct Answer - C | |
| 186. |
Refrigerated fruits maintain flavour and taste for longer period due toA. non-availability of `O_(2)`B. presence of excess of `CO_(2)`C. presence of excess humidityD. slower rate of respiration |
| Answer» Correct Answer - D | |
| 187. |
Dark reaction in photosynthesis is called so becauseA. It can occur in dark alsoB. It does not depend on light energyC. It can not occur during day lightD. It occurs more rapidly at night. |
| Answer» Correct Answer - A | |
| 188. |
Mineral activator needed for the enzymes Aconitase of TCA cycle isA. MnB. FeC. MgD. Cu |
| Answer» Correct Answer - B | |
| 189. |
Cut surface of fruits and vegatables often become dark becauseA. Dirty knife makes it darkB. Oxidation of acid in the presence of trace of iron from the knife makes it darkC. Dust of the air makes it darkD. None of the above |
| Answer» Correct Answer - B | |
| 190. |
ETS in bacteria is foundA. cell membraneB. cell wallC. cytoplasmD. mitochondrion |
| Answer» Correct Answer - A | |
| 191. |
Terminal oxidation in ETS isA. stoppage of oxidationB. final release of protonsC. only step where actual oxidation using `O_2` occursD. ETS initiation |
| Answer» Correct Answer - C | |
| 192. |
It is known that red muscle fibres in animals can work for longer periods of time continuously. How is this possible ? |
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Answer» There are basically two kinds of muscle fibers (i) Red muscles (ii) White muscles Red muscles work for a longer time continuously because (i) These muscle fibres are dark red which is due to the presence of red haemoprotein caleld myoglobin. Myoglobin binds and stores oxygen as oxymyoglobin in the red fibres. Oxymyoglibin releases oxygen for utilisation during muscle contraction. (ii) Mitochondria are more in number , hence they work for long periods of time. (iii) Red muscles have less sarcoplamic reticulum. (iv) They carry out considerable aerobic oxidation without accumulating much lactice acid . Thus, red muscle fibres can cantract for a longer period without fatigue. (v) These muscle fibres have slow rate of contraction for long periods e.g., extensor muscles of the human back. |
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| 193. |
Cytochromes areA. Simple proteinsB. S-containing proteinsC. Conjugated proteinsD. Cu-containing proteins |
| Answer» Correct Answer - C | |
| 194. |
Cytochrome oxidase is related withA. Cyt bB. Cyt `a_3`C. Cyt `c_1`D. Cyt. c |
| Answer» Correct Answer - B | |
| 195. |
Cytochromes areA. `O_2` acceptorB. `H_2` acceptorC. Electron acceptorD. All of these |
| Answer» Correct Answer - C | |
| 196. |
Electron transport requiresA. CytochromesB. PhytochromeC. EnzymesD. Hormones |
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Answer» Correct Answer - A (A) Electron transport requires cytochromes. |
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| 197. |
The end product of oxidative phosphorylation isA. NADHB. OxygenC. ADPD. `ATP + H_2O ` |
| Answer» Correct Answer - d | |
| 198. |
The end product of oxidative phosphorylation isA. NADHB. OxygenC. ADPD. `ATP + H_(2)O` |
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Answer» Correct Answer - d Oxidative phosphorylation is the transfer of electrons to oxygen to form `H_(2)O` in the mitochondrial electron transport chain that is coupled to ATP synthesis form ADP and inorganic phosphate by the ATP synthase. |
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| 199. |
The end product of oxidative phosphorylation isA. ATPB. ATP `+H_(2)0 `C. NADHD. Oxygen |
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Answer» Correct Answer - B (B) `ATP" and "H_(2)0` are end-product of oxidative phospho- rylation. |
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| 200. |
Last `e^(-)` acceptor during `ETS` isA. `O_2`B. WaterC. Cytockrome CD. Cytochrome `a_3` |
| Answer» Correct Answer - A | |