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.
| 551. |
"Life without air" was first studied byA. ReductionalB. Free from oxidative damageC. ImpossibleD. Anaerobic |
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Answer» Correct Answer - D (D) Life without air would be anaerobic. |
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| 552. |
Pasteur effect can be studied in case ofA. NostocB. PenicilliumC. PinnulariaD. Saccharomyces |
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Answer» Correct Answer - D (D) Pasteur effect can be studied in case of Saccharomy- ces (yeast). |
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| 553. |
Pasteur effect isA. Stoppage of fermentation in presence of oxygenB. Increase of fermentation in presence of oxygenC. Decrease in fermentation in presence of oxygenD. No effect on fermentation |
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Answer» Correct Answer - A (A) Stoppage of fennentation in presence of oxygen is Pasteur effect. |
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| 554. |
Shikimic acid canbe made fromA. XyluloseB. Erythrose-4-phosphateC. RibuloseD. None of the above |
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Answer» Correct Answer - B PPP provides erthyrose-4- phosphate which is required for the synthesis of shikimic acid. The latter is a precurosor of aromatic ring compounds. |
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| 555. |
Last acceptor of electrons is _______ in ETS which give electrons to oxygen.A. Cyt `c_(1)`B. Cyt cC. Cyt `a-a_(3)`D. Cyt `bc_(1)` |
| Answer» Correct Answer - C | |
| 556. |
Last `e^(-)` acceptor during `ETS` isA. `H_(2)O`B. `O_(2)` combines with carbon to form `CO_(2)`C. Cyt `a_(3)`D. Cyt a |
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Answer» Correct Answer - B The oxygen is the terminal acceptor of electrons which forms a water molecule in presence of protons in ETS `((1)/(2)O_(2)+2e^(-)rarrO^(-2),2H^(+)rarrH_(2)O)` |
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| 557. |
Which of the following exhibits the highest rate of respiration?A. Growing shoot apexB. Germinating seedC. Root tipD. Leaf bud |
| Answer» Correct Answer - b | |
| 558. |
Choose the correct statementA. Pyruvate is formed in the mitochondrial matrixB. During the conversion of succinyl Co-A to succinic acid a molecule of ATP is synthesizedC. Oxygen is vital in respiration for remov- al of hydrogenD. There is complete breakdown of glu- cose in fermentation |
| Answer» Correct Answer - c | |
| 559. |
In which one of the following processes `CO_(2)` is not releasedA. Lactate fermentationB. Aerobic respiration in plantsC. Aerobic respiration in animalsD. Alcoholic fermentation |
| Answer» Correct Answer - A | |
| 560. |
Oxidative phosphorylation isA. Formation of ATP by transfer of phosphate group from a substrate to ADPB. Oxidation of phosphate group in ATPC. Addition of phosphate group to ATPD. Formation of ATP by energy releated from electrons removed during substrate oxidation |
| Answer» Correct Answer - D | |
| 561. |
In which one of the following processes `CO_(2)` is not releasedA. Aerobic respiration in plantsB. Aerobic respiration in animalsC. Alocholic fermentationD. Lactae fermentation |
| Answer» Correct Answer - D | |
| 562. |
Cytochromes are found inA. LysosomesB. Matrix of mitochondriaC. Outer wall of mitochondriaD. Cristae of mitochondria |
| Answer» Correct Answer - D | |
| 563. |
Cytochromes are found inA. entire inner mitochondrial membraneB. cristae onlyC. matrix of mitochondriaD. oxysomes |
| Answer» Correct Answer - A | |
| 564. |
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct ?A. Increasing atmospheric `CO_(2)` concentration up to `0.05%` can enhance `CO_(2)` fixation rateB. `C_(3)` plants respond to higher temperature with enhanced photosynthesis while `C_(4)` plants have much lower temperature optimum.C. Tomato is a greenhouse crop which can be grown in `CO_(2)` -enriched atmosphere for higher yieldD. Light saturation for `CO_(2)` fixation occurs at `10%` of full sunlight. |
| Answer» Correct Answer - B | |
| 565. |
How is `CO_(2)` fixed in photosynthesis in `C_(4)` plants? Explain. |
| Answer» `C_(4)` plants initially fix atmospheric `CO_(2)` to yield a `C_(4)` acid `(C_(4)` cycle). This is called first carboxylation in which phosphoenol pyruvic acid is carboxylated to `C_(4)` acid which subsequently donates one carbon as `CO_(2)` to the calvin cycle (`C_(3)` cycle) where second carboxylation takes place. | |
| 566. |
How may ATP are gained during aerobic respiration using one glucose. |
| Answer» Correct Answer - 36 or 38 ATP | |
| 567. |
In germinating seeds, fatty acids are degraded exclusively in theA. PeroxisomesB. MitochondriaC. ProplastidsD. Glyoxysomes |
| Answer» Correct Answer - D | |
| 568. |
How many ATP molecules are produced by the aerobic oxidation of one molecule of glucose ?A. 2B. 4C. 36D. 34 |
| Answer» Correct Answer - C | |
| 569. |
Pasteurization is heating atA. `70^(@)C` and 60 minutesB. `80^(@)C` and 30 minutesC. `120^(@)C` and 60 minutesD. `60-70^(@)C` and 30 minutes |
| Answer» Correct Answer - D | |
| 570. |
If fatty acids were to be respired they would first be degraded to (A)____ and enter the pathway. Glycerol would enter the pathway after being converted to (B)____ |
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Answer» Correct Answer - A-acetyl Co-A B-PGAL |
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| 571. |
Plants, but not animals, can convert fatty acids to sugars by a series of reactions calledA. PhotosynthesisB. Krebs cycleC. GlycolysisD. Glyoxylate cycle |
| Answer» Correct Answer - D | |
| 572. |
Give resemblances between cellular respiration and buring. |
| Answer» The use of `O_(2)`, production of `CO_(2)`, release of energy and breakdown of chemical bonds. | |
| 573. |
Select the incorrectly matched pair.A. End products of alcoholic Ethanol fermentation - `+CO_(2)`B. End products of lactic acid fermentation - Lactic acid `+CO_(2)`C. Glycolysis -CytoplasmD. Key product of glycolysis - Pyruvic acid |
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Answer» Correct Answer - B Lactic acid fermentation occurs in lactic acid bacteria (e.g., Lactobacillus), some fungi and muscles. In lactic acid fermentation, pyruvic acid produced in glycolysis is directly reduced by NADH to form lactic acid. No `CO_(2)` is produced. The enzyme is lactate dehydrogenase which requires FMN and `Zn^(2+)` `"Pyruvic acid + NADH" underset(FMN,Zn^(2+))overset("Lactose dehydrogenase")(rarr) "Lactic acid + NAD"^(+)` |
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| 574. |
How is proton gradient established ? |
| Answer» By passing protons `(H^(+) "ions")` from the matrix across the inner mitochondrial membrane into the intermembrane space with the energy released during electron transfers over ETS. | |
| 575. |
The energy utilised for the production of proton gradient required for phosphorylation in respiration isA. Light energyB. Energy of oxidation-reductionC. Photochemical energyD. All of the above |
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Answer» Correct Answer - B (B) The energy utilised for the production of proton gra- dient required for phosphorylation in respiration is energy of oxidation-reduction |
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| 576. |
The metabolic pathway through which the electron passes from one carrier to another, is called theA. Chemiosmotic hypothesisB. Tricarboxylic acid cycleC. Electron transport systemD. Glycolysis |
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Answer» Correct Answer - C (C) The metabolic pathway through which the electron passes from one caITier to another. is called the elec- tron transport system. |
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| 577. |
Which of the followig substances yeild less than 4 Kcal/mol when its phosphate bond is hydrolysedA. Creatine phosphateB. ADPC. Glucose-6-phosphateD. ATP |
| Answer» Correct Answer - C | |
| 578. |
Calorie is the unit ofA. SoundB. LightC. HeatD. Temperature |
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Answer» Correct Answer - C (C) Calorie is the unit of heat. |
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| 579. |
Which of the following is essential for conversion of pyruvic acid into acetyl Co-A ?A. LAAB. `NAD^(+)`C. TPPD. All of these |
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Answer» Correct Answer - D The oxidative decarboxylation of pyruvate into acetyl Co-A involves the presence of atleast five co-factors involved are Mg ions. Thiamine Pyrohosphate (TPP) , `NAD^(+)` , Coenzyme-A (Co-A) and lipoic acid. |
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| 580. |
Anaerobic products of fermentation areA. protein and acetic acidB. alcohol , lactic acid or similar compoundsC. ethers and acetonesD. alcohol and lipoproteins |
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Answer» Correct Answer - B Fermentation is defined as anaerobic break down of carbohydrates and other organic compounds to form aldehyde , alcohol and organic acids (lactic acid) with the help of microorganisms or their enzymes. |
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| 581. |
Cytochrome C (small protein) is attached to outer surface of the inner mitochondrial membrane. |
| Answer» Correct Answer - 1 | |
| 582. |
Cytochrome c is a small protein attached to theA. Outer surface of the inner membraneB. Inner surface of the outer membraneC. Inner surface of the inner membraneD. Outer surface of the outer membrane |
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Answer» Correct Answer - A (A) Cytochrome c is a small protein attached to the outer surface of the inner membrane. |
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| 583. |
what is the primary role of cellular respiration ? |
| Answer» To create high-energy chemical bonds in energy carriers. | |
| 584. |
Assertion: Fermentation accounts for only a partial breakdown of glucose whereas in aerobic respiration it is completely degraded to `CO_(2)" and "H_(2)0` Reason: NADH is oxidised to `NAD^(+)` rather slowly in aerobic respiration, however the reaction is very vigorous in case of fermentation.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) Fermentation accounts for only a partial breakdown of glucose whereas in aerobic respiration it is com- pletely degraded to `CO_(2)" and "H_(2)0` . NADH is oxidised to `NAD^(+)` rather slowly in fermen- tation, however the reaction is very vigorous in case of aerobic respiration. |
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| 585. |
Which one of the following mammalian cells is not capable of metabolising glucose to carbon-dioxide aerobically ?A. Liver cellsB. Red blood cellsC. White blood cellsD. Unstriated muscle cells |
| Answer» Correct Answer - B | |
| 586. |
Assertion. Lysosomes help in the process of photorespiration. Reason. Lysosomes contain basic enzymes.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 - D | |
| 587. |
When a yeast produces wine, which is not formed ?A. AcetaldehydeB. Ethyl AlcoholC. `CO_2`D. Acetyl coenzymeA |
| Answer» Correct Answer - D | |
| 588. |
The net gain of glycolysis of one molecule of glucose is the formation ofA. 2NADH + `H^+` + 4ATP+ 1 Pyruvic acidB. 2NADH + `H^+` + 2ATP+2 Pyruvic acidC. SATP +2NADH + `H^+` +2 Pyruvic acidD. SATP+2NADH+`H^+`+ 2 Pyruvic acid +`CO_2` |
| Answer» Correct Answer - B | |
| 589. |
Assertion: Cytochromes are a group of copper containing electron transferring proteins. Reason: The terminal cytochrome reacts with oxygen. |
| Answer» The cytochromes are a group of iron containing electron-trasnferring proteins of aerobic cells that acts sequentially to transfer electrons from flavoprotein to molecular oxygen. The terminal cytochrome of the electron transport chain, which can react with oxygen, is calle ytochrome oxidase. | |
| 590. |
Electron Transport System (ETS) is located in mitochondrialA. outer membraneB. inter membrane spaceC. inner membraneD. matrix |
| Answer» Correct Answer - b | |
| 591. |
Bond between first phosphate and adenosine in ATP isA. Phosphoester bondB. Nitrophosphate bondC. Phosphoanhydride bondD. Adenophosphate bond |
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Answer» Correct Answer - A (A) Bond between first phosphate and adenosine in ATP is phosphoester bond. |
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| 592. |
In electron transport system (ETS) which of the following cytochromes reacts with oxygenA. cyt bB. `cyt c_1`C. cyt aD. `cyt a_3` |
| Answer» Correct Answer - D | |
| 593. |
ATPs generated by `1 NADH_(2)` and `1 FADH_(2)` are, respectively,A. 3,2B. 2,3C. 3,5D. 5,3 |
| Answer» Correct Answer - A | |
| 594. |
Number of shuttles for transportion extra mimtochondrial `NADH_(2)` into mitochondrial isA. 1B. 2C. 3D. 0 |
| Answer» Correct Answer - B | |
| 595. |
`NADH_(2)` generated in glycolysis produces ATP in ETS in presence of `O_(2)`. In absence of `O_(2)` this `NADH_(2)` functions asA. Oxidising agentB. Phosphorylating agentC. Reducing agentD. Carboxylating agent |
| Answer» Correct Answer - C | |
| 596. |
How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to `CO_(2)` and `H_(2)O` yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal ?A. OneB. TwoC. ThirtyD. Fifty seven |
| Answer» Correct Answer - C | |
| 597. |
How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to `CO_(2)` and `H_(2)O` yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcalA. Fifty-sevenB. OneC. TwoD. Thirty |
| Answer» Correct Answer - A | |
| 598. |
How many ATP molecules will be generated in a plant system during complet oxidation of 40 molecules of glucose?A. 180B. 360C. 1440D. 3040 |
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Answer» Correct Answer - c 36 ATP molecules are produced during complet oxidation of one molecule of glucose. So, 40 molecules of glucose will produce `(36 xx 40) ATP = 1440 ATP`. |
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| 599. |
Different substrates get oxidised during respiration. How does Respiratory Quotient (RQ) indicate which type of substrate, i.e., carbohydrate, fat or protein is getting oxidised? `R.Q.=(A)/(B)` What do A and B stand for? What tpye of substrates have R.Q.of `1,lt1orgt1?` |
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Answer» The ratio of `CO_(2)` evolved and consumption of `O_(2)` in respiration is called the Respiratory Quotient (RQ) or respiratory ratio. `R.Q.=(A)/(B)=("Volume of CO_(2) evolved")/("Volume of O_(2) consumed")` Substrates like carbohydrates have RQ=1 during, aerbic respiration. Proteins and fals have RQ of lt 1 and it occurs during germination of seeds. Substrates like organic acids have RQ of gt 1 under aerobic conditions. |
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| 600. |
Consider the following statements with respect to respiration A. Glycolysis occufs in the cytoplasm of the cell B. Aerobic respiration takes place within the mitochondria C. Electron transport system is present in the outer mitochondrial memebrane D) `C_(51)H_(98)O_(5)` is the chemical formula of Tripalmitin, a fatty acid E) Respiratory quotient = (Volume of `O_(2)` evolved)/(Volume of `CO_(2)` consumed) of the above statements.A. A,B and D alone are correctB. B, C and E alone are correctC. C,D and E alone are correctD. B,D and E alone are correct |
| Answer» Correct Answer - A | |