CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How many times is a molecule decarboxylated in the Krebs cycle per glucose molecule?
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1
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2
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3
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4
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Explanation:
Detailed explanation-1: -In the Krebs cycle, decarboxylation occurs in two steps. First oxidative decarboxylation occurs during the conversion of isocitrate into -ketoglutarate.
Detailed explanation-2: -For one glucose molecules, there will be two rounds of Krebs cycle. This is because two molecules of Pyruvic acid are formed from one molecule of glucose during Glycolysis.
Detailed explanation-3: -Hence, the correct answer is option “C” – Three.
Detailed explanation-4: -Krebs cycle produces the following: Two molecules of carbon dioxide are given off. One molecule of ATP is formed.
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