Respiration in Plants MCQ for NEET. We covered all the Respiration in Plants MCQ for NEET in this post for free so that you can practice well for the exam.
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MCQ on Respiration in Plants for NEET Students
In the TCA cycle, substrate-level phosphorylation occurs during the conversion of
(A) oxaloacetic acid to citric acid
(B) succinic acid to malic acid
(C) succinyl CoA to succinic acid
(D) malic acid to oxaloacetic acid
Option c – succinyl CoA to succinic acid
In which of the following steps of the citric acid cycle, decarboxylation occurs? I. Conversion of Citric acid to a-ketoglutaric acid II. Conversion of Succinic acid to Malic acid III. Conversion of Malic acid to Oxaloacetic acid IV. Conversion of a-Ketoglutaric acid to Succinyl COA
(A) I and II only
(B) I and IV only
(C) II and III only
(D) II and IV only
Option b – I and IV only
In ETS, which of the following complex is involved in the synthesis of ATP?
(A) Complex I
(B) Complex V
(C) Complex IV
(D) Complex III
Option b – Complex V
When proteins are used as the respiratory substrate, RQ is
(A) 0.9
(B) 0.5
(C) 0
(D) 1.0
Option a – 0.9
Select the INCORRECT statement from the following with respect to ETS.
(A) In aerobic respiration, the role of oxygen is limited to the terminal stage of the process.
(B) Oxygen acts as the final hydrogen acceptor.
(C) In respiration, light energy is utilized for the production of the proton gradient required for phosphorylation.
(D) ETS in the inner mitochondrial occurs membrane.
Option c – In respiration, light energy is utilized for the production of the proton gradient required for phosphorylation.
During oxidative phosphorylation, ubiquinone receives reducing equivalents via. ……… and gets reduced to ………..
(A) NAD; Cytochrome c
(B) FADH₂; Ubiquinol
(C) FAD; Cytochrome a
(D) Cytochrome bc₁; NADH
Option b – FADH₂; Ubiquinol
The number of ATP molecules synthesized per acetyl CoA molecule in aerobic respiration is
(A) 12
(B) 34
(C) 16
(D) 9
Option a – 12
The number of glucose molecules required for the synthesis of 38 ATP molecules under anaerobic conditions by a yeast cell is
(A) 1
(B) 4
(C) 19
(D) 38
Option c – 19
Read the given statements and select the correct option. Statement I: The net gain of glycolysis is two molecules of ATP, two molecules of NADH₂, and two molecules of pyruvic acid per glucose molecule. Statement II: For completing one turn of the Krebs cycle, two molecules of pyruvic acid formed by glycolysis are required. The correct statement is
(A) Statement I
(B) Statement II
(C) Both Statements I and II
(D) Neither statement I nor II
Option c – Both Statements I and II
During exercise, incomplete breakdown of glucose in the muscle cells results in the formation of
(A) alcohol and water
(B) CO₂ and water
(C) Lactic acid and CO₂
(D) Only lactic acid
Option d – Only lactic acid
In glycolysis, phosphorylation of glucose to glucose-6-phosphate is catalyzed by the enzyme
(A) Pyruvic acid decarboxylase
(B) Invertase
(C) Hexokinase
(D) Glucose dehydrogenase
Option c – Hexokinase
In the Krebs cycle, 6 carbon acid is formed when acetyl CoA combines with
(A) a-ketoglutaric acid
(B) Phosphoenolpyruvate
(C) Oxaloacetic acid
(D) Citric acid
Option c – Oxaloacetic acid
In plants, other than stomata exchange of gases occurs through
(A) xylem tissue
(B) root hairs
(C) lenticels
(D) phloem tissue
Option c – lenticels
Select the CORRECT statement with respect to fermentation.
(A) It involves the complete oxidation of glucose under anaerobic conditions.
(B) Fermentation by yeast results in the formation of CO₂ and lactic acid.
(C) During fermentation energy released is less than the energy released during aerobic respiration.
(D) Lactic acid fermentation results in lactic acid and CO₂.
Option c – During fermentation energy released is less than the energy released during aerobic respiration.
The respiratory pathway is considered as
(A) Catabolic pathway
(B) Anabolic pathway
(C) Amphibolic pathway
(D) Parabolic pathway
Option c – Amphibolic pathway
Which of the following represents the correct order of reactions taking place in glycolysis? i. Conversion of 3-phosphoglyceraldehyde to 1, 3-bisphosphoglycerate ii. Conversion of 3-phosphoglyceric acid to 2-phosphoglycerate iii. Conversion of 1, 3-bisphosphoglycerate to 3-phosphoglyceric acid iv. Splitting of fructose-1, 6-bisphosphate iv. into dihydroxy acetone phosphate and 3-phospho-glyceraldehyde
(A) i, iii, ii, iv
(B) iv, ii, i, iii
(C) i, ii, iv, iii
(D) iv, i, iii, ii
Option d – iv, i, iii, ii
Which of the following statement is INCORRECT with respect to the EMP pathway?
(A) It occurs outside the mitochondria.
(B) It is an anaerobic phase.
(C) It occurs in all organisms, except anaerobic organisms.
(D) In this process, glucose undergoes partial oxidation.
When pyruvic acid enters aerobic respiration, it undergoes ……….. in the mitochondrial matrix.
(A) oxidative phosphorylation
(B) oxidative decarboxylation
(C) alcoholic fermentation
(D) isomerisation
Option b – oxidative decarboxylation
Besides the net gain of 2 ATP molecules in glycolysis, the other molecules simultaneously formed are
(A) FAD
(B) FADPH+H*
(C) NADH+H*
(D) FAMH₂
Option c – NADH+H*
Considering only glycolysis, when 3 glucose molecules are converted into pyruvic acid, the number of ATP consumed and produced will be
(A) 4 and 8 ATP molecules respectively.
(B) 2 and 4 ATP molecules respectively.
(C) 6 and 12 ATP molecules respectively.
(D) 2 and 2 ATP molecules respectively.
Option c – 6 and 12 ATP molecules respectively.
In glycolysis, the redox equivalents removed from PGAL and transferred to co-enzyme NAD, are in the form of
(A) three carbon atoms
(B) two hydrogen atoms
(C) two oxygen atoms
(D) four phosphorus atoms
Option b – two hydrogen atoms
Select the INCORRECT statement from the following.
(A) ATP is the common immediate source of energy in cellular activity.
(B) ATP is the energy currency of the cell.
(C) Cell respiration is carried out by mitochondria.
(D) ATP is also known as the powerhouse of the cell.
Option d – ATP is also known as the powerhouse of the cell
Before entering into Krebs’ cycle pyruvic acid undergoes oxidative decarboxylation to form
(A) Oxalo acetic acid
(B) a-ketoglutaric acid
(C) Acetyl Co-A
(D) PEP
Option c – Acetyl Co-A
Which of the following reaction does NOT occur when citric acid is converted into a-ketoglutaric acid in Krebs’ cycle?
(A) Isomerization of citrate
(B) Carboxylation
(C) Reduction of NAD to NADH+H*
(D) Reduction of FAD to FADH+H*
Option d – Reduction of FAD to FADH+H*
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