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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
Substrate-level phosphorylation in the TCA cycle takes place during the transformation of
(a) Oxaloacetate to citrate
(b) Succinic Acid to malate
(c) Succinyl-CoA to succinate
(d) Malate to oxaloacetate
Option c – Succinyl-CoA to succinate
In the citric Acid cycle, decarboxylation occurs during which of the following transitions?
I. Citrate to α-ketoglutarate
II. Succinate to malate
III. Malate to oxaloacetate
IV. α-ketoglutarate to succinyl-CoA
(a) I and II
(b) I and IV
(c) II and III
(d) II and IV
Option b – I and IV
Which of the following complexes in the electron Transport system (ETS) is directly involved in ATP production?
(a) Complex I
(b) Complex V
(c) Complex IV
(d) Complex III
Option b – Complex V
What is the respiratory quotient (RQ) when proteins serve as the respiratory substrate?
(a) 0.9
(b) 0.5
(c) 0
(d) 1.0
Option a – 0.9
Choose the INCORRECT statement about the electron Transport system.
(a) Oxygen is only involved in the terminal stage of aerobic Respiration
(b) Oxygen acts as the terminal hydrogen acceptor
(c) Light energy is required to form the proton gradient during Respiration
(d) The inner mitochondrial membrane houses the ETS
Option c – Light energy is required to form the proton gradient during Respiration
During oxidative phosphorylation, which of the following molecules donates electrons to ubiquinone, reducing it?
(a) NAD to cytochrome c
(b) FADH₂ to ubiquinol
(c) FAD to cytochrome a
(d) Cytochrome bc₁ to NADH
Option b – FADH₂ to ubiquinol
How many ATP molecules are generated per acetyl-CoA Molecule in the aerobic pathway?
(a) 12
(b) 34
(c) 16
(d) 9
Option a – 12
In anaerobic Respiration by yeast, how many glucose molecules are needed to produce 38 ATP molecules?
(a) 1
(b) 4
(c) 19
(d) 38
Option c – 19
Read the statements and select the correct option:
I: Glycolysis yields 2 ATP, 2 NADH₂, and 2 pyruvic Acid molecules per glucose.
II: Two pyruvate molecules are necessary to complete one turn of the Krebs cycle.
(a) Only Statement I is correct
(b) Only Statement II is correct
(c) Both statements are correct
(d) Both statements are incorrect
Option c – Both statements are correct
During intense muscular activity, glucose is partially broken down into
(a) Alcohol and water
(b) Carbon dioxide and water
(c) Lactic Acid and carbon dioxide
(d) Only lactic Acid
Option d – Only lactic Acid
Which enzyme catalyzes the conversion of glucose to glucose-6-phosphate in glycolysis?
(a) Pyruvic Acid decarboxylase
(b) Invertase
(c) Hexokinase
(d) Glucose dehydrogenase
Option c – Hexokinase
In the Krebs cycle, a six-carbon compound forms when acetyl-CoA reacts with
(a) α-ketoglutarate
(b) Phosphoenolpyruvate
(c) Oxaloacetate
(d) Citric Acid
Option c – Oxaloacetate
In plants, gas exchange besides stomata also occurs through
(a) Xylem
(b) Root hairs
(c) Lenticels
(d) Phloem
Option c – Lenticels
Identify the CORRECT statement regarding fermentation.
(a) It involves full oxidation of glucose in absence of oxygen
(b) Yeast fermentation leads to CO₂ and lactic Acid production
(c) Fermentation releases less energy than aerobic Respiration
(d) Lactic Acid fermentation produces lactic acid and CO₂
Option c – Fermentation releases less energy than aerobic Respiration
The respiratory pathway is categorized as a(n)
(a) Catabolic pathway
(b) Anabolic pathway
(c) Amphibolic pathway
(d) Parabolic pathway
Option c – Amphibolic pathway
Choose the correct sequence of reactions during glycolysis:
i. 3-PGAL to 1,3-BPG
ii. 3-PGA to 2-PGA
iii. 1,3-BPG to 3-PGA
iv. Fructose-1,6-BP to DHAP and 3-PGAL
(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 is INCORRECT regarding the EMP pathway?
(a) It takes place in the cytoplasm
(b) It functions without oxygen
(c) It occurs in all except anaerobic Organisms
(d) It involves partial breakdown of glucose
Option c – It occurs in all except anaerobic Organisms
Upon entering aerobic Respiration, pyruvic acid undergoes
(a) Oxidative phosphorylation
(b) Oxidative decarboxylation
(c) Alcohol fermentation
(d) Isomerization
Option b – Oxidative decarboxylation
In addition to 2 NET ATP, glycolysis produces
(a) FAD
(b) FADPH+H⁺
(c) NADH+H⁺
(d) FAMH₂
Option c – NADH+H⁺
During glycolysis, when 3 glucose molecules are broken into pyruvate, the ATP consumed and produced are
(a) 4 used, 8 produced
(b) 2 used, 4 produced
(c) 6 used, 12 produced
(d) 2 used, 2 produced
Option c – 6 used, 12 produced
In glycolysis, the electrons from PGAL are transferred to NAD in the form of
(a) Three carbon atoms
(b) Two hydrogen atoms
(c) Two oxygen atoms
(d) Four phosphate atoms
Option b – Two hydrogen atoms
Choose the INCORRECT statement:
(a) ATP is the immediate source of energy for cellular processes
(b) ATP is known as the energy currency of the cell
(c) Mitochondria perform cellular respiration
(d) ATP is referred to as the powerhouse of the cell
Option d – ATP is referred to as the powerhouse of the cell
Before entering the Krebs cycle, pyruvic acid is converted into
(a) Oxaloacetate
(b) α-ketoglutarate
(c) Acetyl-CoA
(d) PEP
Option c – Acetyl-CoA
Which of the following does NOT occur during the transformation of citric acid to α-ketoglutarate?
(a) Citrate isomerization
(b) Carboxyl group removal
(c) NAD gets reduced to NADH+H⁺
(d) FAD gets reduced to FADH₂
Option d – FAD gets reduced to FADH₂
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