Respiration in Plants
2 solved NEET Biology previous year questions on Respiration in Plants, each with the correct answer and a full explanation.
Q1
What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid? [NEET 2022]
✓ Correct answer: a) Two
ExplanationThe correct option is A: Two.During the breakdown of one glucose molecule into two pyruvic acid molecules through glycolysis, a total of 4 ATPs are produced.However, 2 ATP molecules are used in the preparatory phase of glycolysis.Net gain: The net gain is the total ATP produced minus the total ATP consumed, which is 4-2=2 ATP.
Q2
Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate. [NEET 2024]
✓ Correct answer: d) Succinyl-CoA Succinic acid
ExplanationThe conversion of Succinyl-CoA to Succinic acid involves substrate-level phosphorylation, producing GTP (which is converted to ATP), and does not involve oxidation.All other steps involve the removal of hydrogen atoms, thus involving oxidation.
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