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.
| 51. |
In muscles from three molecules of glucose, two are completely oxidized and one is incompletely oxidized (anaerobic) then, what will be the number of total `NAD^(+0` molecules utilizedA. 10B. 20C. 14D. 8 |
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Answer» Correct Answer - B Complete oxidation of one molecule of glucose produce 10 molecules of `NADH_(2)`. |
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| 52. |
Choose the correct statement :A. Pyruvate is formed in the mitochondrial matrix.B. During the conversion of succinyl Co-A to succinic acid a molecule of ATP is synthesized.C. Oxygen is vital in respiration for removal of hydrogen .D. There is complete breakdown of glucose in fermentation . |
| Answer» Correct Answer - C | |
| 53. |
Substance whose RQ is less than one isA. CarbohydrateB. ProteinC. Organic acidD. All the above |
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Answer» Correct Answer - B Since amount of `CO_(2)` released is less than absorbed `O_(2)` therefore the value of `RQ((CO_(2))/(O_(2)))` is less than unity. |
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| 54. |
The R.Q. of a plant organ depends upon the nature of the substrate which isA. ReducedB. OxidizedC. CatabolizedD. Metabolized |
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Answer» Correct Answer - B Respiratory quotient depends upon the type of substrate participating in respiration. |
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| 55. |
RQ in anaerobic respiration isA. 0.7B. 0.9C. unityD. infinity |
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Answer» Correct Answer - d In anaerobic respiration, there is no consumption of oxygen and carbon dioxide is produced in most of the cases. Therefore, respiratory quotient is infinity. Carbohydrate is the ususal substrate. `C_(6)H_(12)O_(6) overset("ZYmase")rarr 2CO_(2) + 2C_(2)H_(5)OH` `RQ = (2CO_(2))/(Zero O_(2)) =` infinity |
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| 56. |
RQ in anaerobic respiration is |
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Answer» Correct Answer - B During anaerobic respiration, due to the absence of `O_(2)` the value of R.Q is inifine (or more than one). `C_(6)H_(12)O_(6)rarr2CO_(2)+2C_(2)H_(5)OH` RQ `=(2)/(0)=` (inifinite). |
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| 57. |
RQ in anaerobic respiration isA. ZeroB. `oo` (infinity)C. 1D. `lt1` |
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Answer» Correct Answer - B (B) R.Q. of anaerobic respiration is as no `O_(2)` is consumed R.Q. `= (2)/(0)=oo` |
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| 58. |
Assertion : Water and mineral uptake by root hairs from the soil occurs through apoplast until it reaches edodermis. Reason : casparian strips in endodermis are suberized.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 - C | |
| 59. |
R.Q. would depend uponA. Nature of enzymesB. Nature of substrateC. Amount of `CO_(2)` releasedD. Amount of `0_(2)` utilised |
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Answer» Correct Answer - B (B) R.Q. would depend upon nature of substrate. |
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| 60. |
Which is correct for catabolism of 18 C fatty acid?A. Mitochondria, beta oxidation, 148 ATP moleculesB. Mitochondria, beta oxidation, 140 ATP moleculesC. Cytosol, beta oxidation, 146 ATP moleculesD. Cytosol, beta oxidation, 140 ATP molecules |
| Answer» Correct Answer - A | |
| 61. |
The first compound of TCA cycle isA. Oxalo succini acidB. Oxalo acetic acidC. Citric acidD. Cis aconitic acid |
| Answer» Correct Answer - C | |
| 62. |
How many ATP are formed from NADP`H^(+)` to `NAD^(+)`A. 2 ATPB. 3 ATPC. 6 ATPD. 4 ATP |
| Answer» Correct Answer - B | |
| 63. |
The oxygen evolved during photosynthesis comes from water molecules . Which one of the following pairs of elemnets is involved in this reaction ?A. Magnesium and ChlorineB. Mananese and ChlorineC. Manganese and PotassiumD. Magnesium and Molybdenum |
| Answer» Correct Answer - B | |
| 64. |
Zymosis is also calledA. fermentationB. action of zymogensC. pasteurizationD. synapsis of chromosomes |
| Answer» Correct Answer - A | |
| 65. |
What is zymosis ? |
| Answer» Another term for fermentation. | |
| 66. |
If a person is feeling dizzy, glucose or fruit juice is given immediately but not a cheese sandwich, which might have more energy. Explain. |
| Answer» The glucose as absorbed and reaches blood, giving instant energy.Whereas, cheese sandwich will repuire time for digestion, and absorption. Sick person requires immediate energy supply, so glucose or fruit juices contanis glucose are given to them. | |
| 67. |
Where to PGA and glycine gain entry respectively after being formed during photorespiration in plants. What happens to them immediately after? |
| Answer» PGA remains in the chloroplast where it enters into Calvin cycle. Glycine enters into mitochondria where it gets converted to serine and release carbon dioxide. | |
| 68. |
If a person is feeling dizzy, glucose or fruit juice is given immediately but not cheese sandwich, which might have more energy. Explain. |
| Answer» Because under natural conditions only carbohydrates are used as respiratory substrates. This is also called floating respiration. Glucose and fruit juices contain carbohydrates which are able to provide ATA. | |
| 69. |
How does a tree trunk exchange gases with the environment although it lacks stomata? |
| Answer» Due to the presence of lenticels in the periderm which is connected internally to the network of parenchyma with outside world. | |
| 70. |
Read the following four statements (A-D) (A) Both, photophosphorylation and oxidative phoshorylation involve up hill transport of protons across the membrane (B) In dicot stems, a new cambium origanets from the cell of pericycle at trhe time of secondary growth (C ) Stamens in flowers of Gloriosa and Petunia are polyandrous Symbiotic nitrogen-fixers occur in the free-living state also in soil How many of the above statements are rightA. OneB. TwoC. ThreeD. Four |
| Answer» Correct Answer - B | |
| 71. |
Assertion. The atmospheric concentration of `CO_(2)` at which photosynthesis just compensates for resoiration is referred to as `CO_(2)` compensation point. Reason. `CO_(2)`-compensation point is reached when the amount of `CO_(2)` uptake is less than that generated through respiration because the level of `CO_(2)` is more than that required for achieving `CO_(2)`-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 | |
| 72. |
Assertion. Cytochrome oxidase enzyme contains copper. Reason. Cyanide combines with the copper of cytochrome oxidase and prevents `O_(2)` combining with it.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 | |
| 73. |
Assertion. Cyanide promotes oxidative phosphonylation. Reason. Cyanide is an important component of electron transport system.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 - D | |
| 74. |
Cyanide kills the organisms/stop cell activity byA. reducing water potentialB. decreasing diffusion of oxygenC. interfering in respiratory mechanism by preventing transfer of electron from copper of cyt `a_3` to oxygenD. coagulating proteins of carriers in ETC |
| Answer» Correct Answer - C | |
| 75. |
During oxidative phosphorylation, protons return toA. matrix from outsideB. outside from matrixC. in both directionsD. mitochondria to cytoplasm |
| Answer» Correct Answer - A | |
| 76. |
ATP synthesis proposed by Peter Mitchell isA. PhosphorylationB. PhotophosphorylationC. Oxidative phosphorylationD. Chemiosmotic synthesis |
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Answer» Correct Answer - D (D) ATP synthesis proposed by Peter Mitchell is chemios- motic synthesis. |
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| 77. |
Oxidation of one `NADH` and one `FADH_(2)` respectively gives rise to_____and _____ATP molecules.A. 3 and 2B. 2 and 1C. 2 and 3D. 1 and 1 |
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Answer» Correct Answer - a Oxidation of one molecule of NADH gives rise to 3 molecules of ATP while that of one molecule of `FADH_(2)` produces 2 molecules of ATP. |
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| 78. |
What is the total number of `FADH_2` molecules produced by glycolysis and the citric acid cycle (two turns of the cycle)?A. 1 mole at Succinate to Fumarate conversionB. 2 moles at Succinate to Fumarate conversionC. 3 moles at Malate to Oxaloacetate conversionD. 4 moles at Mal ate to Oxaloacetate conversion |
| Answer» Correct Answer - B | |
| 79. |
Choose the correct combination of labelling the numeberof carbon compounds in the substrate molecules, involved in the citric acid cycle A. A-4C, B-6C, C-5C, D-4C, E-4CB. A-6C, B-5C, C-4C, D-3C, E-2CC. A-2c,B-5C,C-6C, D-4C, E-4CD. `A-4C, B-6C, C-4C, D-4C, E-4C |
| Answer» Correct Answer - A | |
| 80. |
In citric acid cycle decarboxylation occurs whenA. Citric acid converts to `alpha`-ketoglutaric acidB. Succinic acid converts to malic acidC. Malic acid converts to oxaloacetic acidD. Oxaloacetic acid converts to citric acid |
| Answer» Correct Answer - A | |
| 81. |
Citric acid cycle is…….step in carbohydrate metavbolismA. FirstB. SecondC. ThirdD. Fourth |
| Answer» Correct Answer - C | |
| 82. |
Respiratory quotient (R.Q.) for a fatty acid, Tripalmitin isA. 0.9B. 1.4C. 1D. 0.7 |
| Answer» Correct Answer - D | |
| 83. |
Recognise the figure and find out the correct matching. A. `a-ATP, b-NADH, c-H_(2)0 `B. `a-H_(2)0 , b-NADH, c-ATP `C. `a-NADH, b-H_(2)0 , c-ATP`D. `a-H_(2)0 , b-ATP, c-NADH` |
| Answer» Correct Answer - C | |
| 84. |
The connecting link between glycolysis and TCA cycle isA. Acetyl CoAB. OAAC. Pyruvic acidD. Citric acid |
| Answer» Correct Answer - A | |
| 85. |
The connecting link between glycolysis and Krebs cycle isA. Acetyl CoAB. CoQC. CoenzymeD. CoA |
| Answer» Correct Answer - A | |
| 86. |
ETS (electron transport system) is found inA. CytoplasmB. Mitrochondrial matrixC. Inner mitochondral membraneD. Outer mitochondrial membrane |
| Answer» Correct Answer - A | |
| 87. |
Acetyl CoA forms a 6-C compound after combining withA. Malic acidB. Citric acidC. Succinic acidD. Oxaloacetic acid |
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Answer» Correct Answer - D (D) Acetyl CoA forms a 6-C compound after combining with oxaloacetic acid. |
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| 88. |
During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP ?A. Conversion of pyruvic acid to acetyl CoAB. Electron transport chainC. GlycolysisD. Krebs cycle |
| Answer» Correct Answer - B | |
| 89. |
During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP ?A. Conversion of pyruvic acid to acetyl Co-AB. Electron transport chainC. GlycolysisD. Krebs cycle |
| Answer» Correct Answer - B | |
| 90. |
Why does chlorophyll appear red in reflected light and green in transmitted light? Explain the significance of these phenomena in terms of photosynthesis. |
| Answer» In reflected light, the chlorophyll appears red because of fluorescence. The light absorbed by chlorophyll molecules loses its energy and emitted as red photons. In transmitted light, chlorophyll appears green because it absorbs other lights except green. | |
| 91. |
Mitochondria supply most of the necessary biological energy beA. Breaking of proteinsB. Reduction of NADPC. Breaking of sugarsD. Oxidising TCA substrates |
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Answer» Correct Answer - D (D) Most of the biological energy is supplied by mito- chondria through oxidising TCA substrates .. |
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| 92. |
The respiratory enzymes are located inA. Mitochondrial matrixB. Perimitochondrial spaceC. CristaeD. Outer membrane |
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Answer» Correct Answer - A (A) The respiratory enzymes are located in mitochondrial matrix. |
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| 93. |
Enzyme pair common to both EMP and `C_(3)` cycle isA. Aldolase and enolaseB. Aldolase and triose phosphate isomeraseC. Phosphoglyceromutase and triose phosphate isomeraseD. Cytochrome oxidase and enolase |
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Answer» Correct Answer - B (B) Enzyme pair common to both EMP and `C_(3)` cycle is aldolase and triose phosphate isomerase. |
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| 94. |
Excess of ATP inhibits respiration by inhibiting one of the following enzymesA. phosphofructokinaseB. pyruvic dehydrogenaseC. isomeraseD. acomitase |
| Answer» Correct Answer - A | |
| 95. |
Excess of ATP inhibits respiration by inhibiting one of the following enzymesA. PhosphofructokinaseB. HexokinaseC. Pyruvate decarboxylaseD. Aldolase |
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Answer» Correct Answer - A (A) Excess of ATP inhibits respiration by inhibiting Phosphofructokinase enzymes (this is end product inhibition). |
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| 96. |
Total number of ATP molecules produced per glucose molecule in eucaryotic cell isA. 4B. 36C. 2D. 38 |
| Answer» Correct Answer - C | |
| 97. |
In........plants, the `CO_(2)` compensation point is usually much higher than in.....plants. |
| Answer» Correct Answer - `C_(3), C_(4)` | |
| 98. |
Select the incorrect statements with respect to the given representation. A. X is the enzyme pyruvate dehydrogenase and Y is the enzyme ethanol decarboxylaseB. This process is involved in brewing industry for producing beverages like beer, rum, whisky, etc.C. Accumulation of the end product (i.e., ethanol) during this process, in a culture of yeast, stops the multiplication of yeast cells and may even lead to death of cells.D. None of these |
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Answer» Correct Answer - a The given representation depicts ethyl alcohol fermentation (alcoholic fermentation), which is quite common in some fungi (e.g., yeast, Rhizopus) and bacteria. X is the enzyme pyruvate decarboxylase and Y is the enzyme alcohol dehdrogenase. |
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| 99. |
How many TCA cyles are required during the complete oxidation of one sucrose molecule ?A. 4B. 2C. 1D. 3 |
| Answer» Correct Answer - A | |
| 100. |
The correct sequence in Krebs cycle isA. Oxaloacetic acid `to alpha`-ketoglutaric acid `to` Isocitric acidB. Oxaloacetic acid `to` Isocitric acid `to alpha`-ketoglutaric acidC. `alpha` ketoglutaric acid `to ` Isocitric acid `to` Oxaloacetic acidD. Isocitric acid `to alpha` ketoglutaric acid `to` Oxaloacetic acid |
| Answer» Correct Answer - D | |