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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.
| 401. |
When a substrate is being metabolised, why does not all the energy that is produced get released in one step. It is released in multiple steps. What is the advantage of step-wise release? |
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Answer» The process of aerobic repsiration is divided into four phases-glycolysis, TCA cycle, ETS and oxidative phosphorylation. The process of respiration and production of ATP in each phase takes place in a step-wise manner. The product of none pathway forms the substrate of the other and these substrates enter of withdrawn from the pathway according to the necessity ATP gets utlised wherever required and enzymatic rates are generally controlled. Thus, the step-wise released of energy makes the system more effect is extracting and storing energy. |
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| 402. |
When malic acid is respiratory substrate, the amount of `CO_(2)` released isA. More than `O_(2)` consumedB. Less than `O_(2)` releasedC. Equal to `O_(2)` consumedD. `CO_(2)` is not released |
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Answer» Correct Answer - A (A) When malic acid is respiratory substrate, the amount of `CO_(2) released is more than `O_(2)` consumed. |
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| 403. |
Link between glycolysis, Krebs cycle and `beta`-oxidation of fatty acid or carbohydrate and fat metabolism isA. OAAB. CytochromeC. Acetyl Co-AD. Pyruvic acid |
| Answer» Correct Answer - C | |
| 404. |
Which of the following is the phosphorylating unitA. OxysomeB. MesosomeC. PeroxisomeD. Mitochondria |
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Answer» Correct Answer - A Oxysome acts as the unit of phosphorylation in respiration by the formation of ATP from ADP occur on oxysome . These are present on cristae of mitochondria. |
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| 405. |
Which of the following show higher rate of respirationA. CollenchymaB. LeafC. Dry seedsD. Germinating seeds |
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Answer» Correct Answer - D Respiration rate high at growing regions like floral and vegetative bud, geminating seedlings, Young leaves stem and root apices. |
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| 406. |
Which of the following option is correct for photorespirationA. In chloroplast, glycerate forms glycineB. In peroxisome, glycerate forms phosphoglycolateC. In mitochondrion, glycine forms serineD. In bundle sheath, serine from glycine |
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Answer» Correct Answer - C Two molecules of glycine form a molecule of serine, `CO_(2)` and `NH_(3)` in mitochondria. |
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| 407. |
In submerged hydrophytes entry of `CO_(2)` is throughA. Epidermis as dissolved `CO_(2)`B. Epidermis as carbonates onlyC. Epidermis as bicarbonates onlyD. Both b and c |
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Answer» Correct Answer - D In submerged hydrophytes (plants which remian completely dipped in the water)`CO_(2)` enters through epidermis as both carbonates and bicarbonates. |
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| 408. |
Salt respiration is also called asA. Anion respirationB. Cation respirationC. PhotorespirationD. None of the above |
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Answer» Correct Answer - A According to Lundegarth amount of anion absorbed by plant cells rather than to the absorption of cations of salts so it is also called anion respiration. |
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| 409. |
Adenosine diphospate containsA. One high energy bondB. Two high energy bondC. Three high energy bondD. Four high energy bond |
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Answer» Correct Answer - A `ADPoverset("hydroglysis")rarrAMP+"Pi"+7.3`kcal. |
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| 410. |
ATP was discovered byA. BlackmanB. BowmanC. LipmanD. Karl Lohman |
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Answer» Correct Answer - D ATP was discovered respiration is an enzyme controlled process of bilogical oxidation of food materials in a living cell. Using molecular `O_(2)`. Producing `CO_(2)` and `H_(2)O` and releasing energy in small step and stroing it in biologically useful forms generally ATP. it occurs in mitochondria. |
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| 411. |
Aerobic respiration is calledA. FermentationB. ChemosynthesisC. Bio-oxidationD. Photorespiration |
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Answer» Correct Answer - C Because it takes place in living beings (biological matter). |
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| 412. |
`C_(4)` plants are more efficient in photosynthesis than `C_(3)` plants due toA. lower rate of photorespirationB. higher leaf areaC. presence of larger number of chloroplasts in leaf cellsD. presence of thin cuticle. |
| Answer» Correct Answer - C | |
| 413. |
Which one is product of aerobic respiration?A. Malic acidB. Ethyl alcoholC. Lactic acidD. Pyruvic acid |
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Answer» Correct Answer - A (A) Malic acid is product of aerobic respiration. |
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| 414. |
........, generated in the glycolysis enters into the mitochondrial matrix undergoes..........decarboxylation to form.....Coenzyme. |
| Answer» Correct Answer - Pyruvic acid, oxidative, acetyl | |
| 415. |
GlycolysisA. Takes place in the mitochondriaB. Produces no ATPC. Has no connection with electron transport chainD. Reduces two molecules of `NAD^(+)` for every glucose molecule processed |
| Answer» Correct Answer - D | |
| 416. |
Which is not true for glycolysisA. End product is `CO_2 and H_2O`B. Substrate level phosphorylationC. Production of ATPD. Expenditure of ATP |
| Answer» Correct Answer - A | |
| 417. |
The first phase in the breakdown of glucose in animal cell isA. FermentationB. Krebs cycleC. GlycolysisD. E.T.S. |
| Answer» Correct Answer - C | |
| 418. |
End product of glycolysis isA. Citric acidB. GlyceraldehydeC. PhosphoglyceraldehydeD. Pyruvic acid |
| Answer» Correct Answer - D | |
| 419. |
In glycolysis ultimately (or end product of glycolysis is)A. Acetyl CoAB. pyruvateC. ethanolD. `CO-2+H_2O` |
| Answer» Correct Answer - B | |
| 420. |
In glycolysis ultimately (or end product of glycolysis is)A. Ethyl alcoholB. Acetyl CoAC. Pyruvic acidD. ATP |
| Answer» Correct Answer - C | |
| 421. |
RQ of fats and proteins is generallyA. 1B. Less than 1C. Greater than 1D. Zero |
| Answer» Correct Answer - B | |
| 422. |
Give the role of ATPase. |
| Answer» ATP formation from ADP, `P_(i)` and energy from downhill flow of proton. | |
| 423. |
What are the two components of ATPase complex? Where are these located and what are their functions? |
| Answer» The two components of ATPase complex of `CF_(0)` (coupling `"factor"_(0))` and `CF_(1)` (coupling `"factor"_(1)`). `CF_(0)` is embedded in the thylakoid membrane where it forms a transmembrane channel that facilitates diffusion of protons across the membrane. `CF_(1)` protrudes on the outer surface of thylakoid membrane. This is the site where ATP is synthesised from ADP. | |
| 424. |
The diagram given below shows stages in the light-independent reactions of photosynthesis. Answer the following: a) At which stage NADPH is oxidised? b) What are A,B and C? c) At what stages ATP is converted into ADP? |
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Answer» a) NADPH is oxidised at stage E b) A=RuBP carboxylase-oxygenase (RuBisCO) B= Reduction C= Regeneration c) ATP is converted to ADP at stages D and F. |
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| 425. |
What is the most important function of PS II? |
| Answer» The most important of PS II is splitting of water and evolution of molecular oxygen. First of all, the light falls on PS II and the reaction center of PS II (i.e., `P_(680)`) gets excited. The excited reaction center reduces quinone and gets oxidized. The oxidized `P_(680)` then gets electrons from water. The electrons from quinone move to electron transport chain. | |
| 426. |
Select a plant from the following which is photosynthestically more efficient? Give any two reasons in support of your answer: Pea, Soyabean, Sugar cane, Mustard, Ground nut |
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Answer» Sugarcane is photosynthetically more efficient because of the following reasons: a) It is a `C_(4)` plant and performs an additional `C_(4)` pathway. Such plants lack photorespiration. b) `C_(4)` plants have greater productivity of biomass and the `CO_(2)` compensation point is more. |
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| 427. |
Define RQ. What is its value for fats? |
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Answer» Respiratory quotient (RQ) or respiratory ratio can be defined as the ratio of the volume of `CO_(2)` evolved to the volume of `O_(2)` consumed during respiration. The value of respiratory quotient depends on the type of respiratory substrate. Its value is one for carbohydrates. However, it is always less than one for fats as fats consume more oxygen for respiration than carbohydrates. It can be illustrated through the example of tripalmitin fatty acid, which consumes 145 molecules of `O_(2)` for respiration while 102 molecules of `CO_(2)` are evolved. The RQ value for tripalmitin is `0.7.` |
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| 428. |
RQ of proteins, carbohydrates, fats and organic acids are in orderA. `lt 1,1, lt 1, gt 1`B. `gt 1, lt 1, 1, 1`C. `1, 1, 0, -1`D. `0, lt 1,1, gt 1` |
| Answer» Correct Answer - a | |
| 429. |
Pyruvate dehydrogenase complex is usedc in convertingA. Pyruvate to glucoseB. Glucose to pyruvateC. Pyruvic acid to lactic acidD. Pyruvate to acetyl Co-A |
| Answer» Correct Answer - D | |
| 430. |
Pyruvate dehydrogenase is used in convertingA. glucose to pyruvateB. pyruvic acid to lactic acidC. pyruvate to acetyl CoAD. pyruvate to glucose |
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Answer» Correct Answer - C Pyruvate dehydrogense is used in convering pyruvate to acetyl CoA. |
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| 431. |
R.Q. for protein isA. 0.7B. 1C. 0.9D. More than one |
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Answer» Correct Answer - C (C) RQ of protein is 0.9. |
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| 432. |
Complex III and IV of the ETS are respectively:A. NADH dehydrogenase and `FADH_(2)`B. `FADH_(2)` and cytochrome c oxidaseC. Cytochrome c oxidase and cytochrome `bc_(1)` complexD. Cytochrome `bc_(1)` complex and cytochrome c oxidase |
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Answer» Correct Answer - D (D) NADH dehydrogenase (Complex I) `FADH_(2)` (Complex II) Cyt `bc_(1)` complex (Complex Ill) Cyt c oxidase (Complex IV) ATP synthase ( complex V) |
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| 433. |
In ETS, complex I and IV are respectivelyA. NADH dehydrogenase and `FADH_(2)`B. `FADH_(2)" and "NADH` dehydrogenaseC. NADH dehydrogenase and cytochrome oxidase complexD. NADH dehydrogenase and ATP synthase |
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Answer» Correct Answer - C (C) NADH dehydrogenase and cytochrome oxidase are, complexes I and IV respectively. |
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| 434. |
Complex V in ETS consists ofA. `F_0 - F_1`B. ATP synthaseC. Both correctD. Cytochrome C oxidase |
| Answer» Correct Answer - C | |
| 435. |
Which cell does not respire?A. Mesophyll cellB. Sieve tube cellC. Epidermal cellD. Cork cell |
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Answer» Correct Answer - D (D) Cork cell does not respire as these are non-living. |
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| 436. |
A molecule of ATP is formed as an electron passes fromA. Cyt c to Cyt aB. Cyt b to Cyt cC. Cyt a to Cyt cD. Cyt c to Cyt b |
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Answer» Correct Answer - B (B) A molecule of ATP is formed as an electron passes from Cyt b to Cyt c. |
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| 437. |
During movement of electron through ETCA. Electron undergoes resonanceB. Electron undergoes fluorescenceC. Electron undergoes active transportD. pH of matrix increases |
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Answer» Correct Answer - D (D) pH of matrix increases during passage of electron over ETC. |
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| 438. |
The rate of respiration could be checked byA. MalonateB. `CO_(2)`C. Chloroform and cynidesD. All the above |
| Answer» Correct Answer - D | |
| 439. |
Beverages are produced byA. PhotorespirationB. Lactate fermentationC. Aerobic respirationD. Alcoholic fermentation |
| Answer» Correct Answer - D | |
| 440. |
The high-energy bonds of ATP are betweenA. C-CB. C-OC. C-ND. O-P |
| Answer» Correct Answer - D | |
| 441. |
If a starved plant is provided with glucose, the rate of respiration wouldA. DecreaseB. IncreaseC. Become constantD. First rise and than all |
| Answer» Correct Answer - B | |
| 442. |
In ETC, ATP is not formed in which of the following stepsA. FMN- UQB. Cyt c-cyt aC. Cyt b - cyt cD. Cyt a- cyt `a_3` |
| Answer» Correct Answer - B | |
| 443. |
Respiration of starved leaves (consuming proteins) is calledA. protoplasmic respirationB. floating respirationC. photorespirationD. oxidative phosphorylation |
| Answer» Correct Answer - A | |
| 444. |
The `C_(4)`-plants are different from the `C_(3)`-plants with reference to theA. substrate that acceptors `CO_(2)` in carbon asimilationB. type of end productC. type of pigment involved in photosynthesisD. number of ATP that are consumed in preparing sugar. |
| Answer» Correct Answer - A | |
| 445. |
The colour in the brown fat is due toA. its larger capacity for generating heatB. large number of mitochondria presentC. a high concentration of iron containing cytochrome pigments.D. presence of chromatophores. |
| Answer» Correct Answer - C | |
| 446. |
In opuntia, in night the R.Q. will beA. OneB. More than oneC. ZeroD. Less than one |
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Answer» Correct Answer - C (C) In Opuntia and other succulents, night time R.Q. is zero. |
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| 447. |
RQ of 4, 1 and 0.7 occur in case ofA. Malic acid, palmitic acid and tripalmitinB. Oxalic acid, carbohydrate and tripalmitinC. Tripalmitin, malic acid and carbohydrateD. Palmitic acid, carbohydrate and oxalic acid |
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Answer» Correct Answer - B (B) RQ of 4, 1 and 0·7 occur in case of oxalic acid, carbohydrate and tripalmitin. |
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| 448. |
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. 1B. 2C. 30D. 57 |
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Answer» Correct Answer - D (D) 12 kcal produces - 1 ATP 1 kcal produces - `1//12` ATP 686 kcal produces -`686 xx(1)/(2)=57`ATP |
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| 449. |
Assertion: All carbohydrates are usually first converted into glucose before they are used for respiration. Reason: Proteins fats and organic acid can also be respired but they do not enter respiratory pathway at the first step.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 - B (B) All carbohydrates are usually first converted into glucose before they are used for respiration. Proteins, fats and organic acids can also be respired but they do not enter the respiratory pathway at the first step. |
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| 450. |
Fermentation isA. Anaerobic respirationB. Incomplete oxidation of carbohydratesC. Complete oxidation of carbohydratesD. None of the above |
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Answer» Correct Answer - A (A) Fermentation is anaerobic respiration. |
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