Respiration In Plants — DPP 1

20 NEET questions from Respiration In Plants, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

Attempt this test free 20 questions · 30 minutes · +80 marks
1
Before entering the TCA cycle, pyruvic acid converted into CoA. This process is :-
  1. A Oxidative carboxylation
  2. B Oxidative dehydration
  3. C Oxidative decarboxylation
  4. D Reductive phosphorylation
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Correct answer: C

2
What is the incorrect statement regarding respiration :-
  1. A During oxidation all the energy is released free into the cell in single step.
  2. B Carbon skeleton producing during respiration is used as a precursors for biosynthesis.
  3. C Energy released in respiration trapped as chemical energy in the form of ATP.
  4. D The breaking of the C-C bond of complex compounds through oxidation leading to release of energy.
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Correct answer: A

3
How many molecules of $\mathrm{CO}_{2}$ are released in respiration per glucose molecule?
  1. A Two
  2. B Three
  3. C Four
  4. D Six
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Correct answer: D

4
Plant can go along without respiratory organs because :-
  1. A Stem respire at higher rate than leaf
  2. B Large transport of gases is required from one part to another
  3. C Do not have great demands for gaseous exchange
  4. D More than one option is correct
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Correct answer: C

5
When a molecule of pyruvic acid is subjected to anaerobic oxidation and form alcohol then indirectly it can be considered that there is :-
  1. A Gain of 4 ATP
  2. B Loss of 3 ATP
  3. C Loss of 6 ATP
  4. D Gain of 8 ATP
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Correct answer: B

6
Phosphofructokinase (PFK) is an allosteric enzyme that catalyses the conversion of Fructose-6-phosphate to Fructose 1, 6-bisphosphate. In the presence of $\mathrm{O}_{2}$, an decrease in the amount of ATP in a cell would be expected to :-
  1. A Inhibit the enzyme, thus slow the rate of glycolysis
  2. B Activate the enzyme, thus slow the rate of glycolysis
  3. C Inhibit the enzyme, thus increase the rate of glycolysis
  4. D Activate the enzyme, thus increase the rate of glycolysis
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Correct answer: D

7
In eukaryotic respiration, ATP synthase complex is present in :-
  1. A Mitochondrial matrix
  2. B Inner mitochondrial membrane
  3. C Cytoplasm
  4. D Peri mitochondrial space
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Correct answer: B

8
Although the aerobic process of respiration takes place only in the presence of oxygen, the role of oxygen is limited to the.....A.... of the process. yet, the presence of oxygen is vital, since it drives the whole process by.....B.... from the system :-
  1. A A = ETS, B = removing electron
  2. B A = Krebs cycle, B = Removing Hydrogen
  3. C A = Terminal stage, B = removing hydrogen
  4. D A = Link reaction & Krebs cycle, B = Removing electrons
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Correct answer: C

9
If 1 glucose = 600 Kcal, 1 ATP = 12 Kcal and ATP gain during complete oxidation of this glucose molecule is 30 ATP, than the efficiency of respiration is :-
  1. A 40%
  2. B 50%
  3. C 60%
  4. D 100%
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Correct answer: C

10
Net gain ATP from one molecule of glucose during glycolysis or EMP pathway :-
  1. A 38 ATP
  2. B 4 ATP
  3. C 8 ATP
  4. D 30 ATP
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Correct answer: C

11
How many ATP will produced during the production of 1 molecule of acetyl CoA from one molecule of glucose?
  1. A 11 ATP
  2. B 15 ATP
  3. C 13 ATP
  4. D 6 ATP
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Correct answer: A

12
Which one of the following is odd ?
  1. A EMP pathway
  2. B TCA cycle
  3. C CA cycle
  4. D Organic acid cycle
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Correct answer: A

13
Which one of the following is a common pathway in breakdown of glucose, fat and protein?
  1. A Glycolysis
  2. B Link reaction
  3. C Krebs cycle
  4. D $\beta$-oxidation
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Correct answer: C

14
During glycolysis the number of ATP molecules utilised to change glucose into 2 phosphoglycerate are :-
  1. A 4
  2. B 3
  3. C 2
  4. D 1
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Correct answer: C

15
End product of link reaction is
  1. A Citric acid
  2. B Glyceraldehyde
  3. C Acetyl CoA
  4. D Pyruvic acid
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Correct answer: C

16
The net yield of ATP, except substrate level phosphorylation, from Krebs cycle per glucose molecule is :-
  1. A 12
  2. B 24
  3. C 22
  4. D 36
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Correct answer: C

17
Which of the following is not an oxidation reaction?
  1. A 1, 3 Bis PGAL to 1,3 Bis PGA
  2. B 1,3 Bis PGA to 3-PGA
  3. C Pyruvic acid to acetyl CoA
  4. D Malic acid to oxaloacetic acid
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Correct answer: B

18
First $\mathrm{CO}_{2}$ release in aerobic respiration occurs during :-
  1. A 3-PGAL formation
  2. B Pyruvic acid formation
  3. C Acetyl CoA formation
  4. D $\alpha$-Ketoglutaric acid formation
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Correct answer: C

19
Four carbon intermediate molecule of TCA cycle is :-
  1. A Citric acid
  2. B Succinyl CoA
  3. C $\alpha$-Ketoglutaric acid
  4. D Ribulose bis phosphate
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Correct answer: B

20
Which enzymes are/is used in fermentation:-
  1. A Pyruvic acid dehydrogenase
  2. B Alcohol decarboxylase
  3. C Lactate dehydrogenase
  4. D Both (1) and (3)
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Correct answer: C

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