CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Pyruvic acid must be first converted into what molecule before it enters the krebs cycle?
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RuBP
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citric acid
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acetic acid
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CoA
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Explanation:
Detailed explanation-1: -The first step of this pathway begins with the decarboxylation of pyruvate to the Krebs cycle starting molecule, acetyl-CoA.
Detailed explanation-2: -For pyruvic acid to enter the citric acid cycle, it must first be oxidized to acetyl CoA. The acetyl CoA then joins with a molecule of oxaloacetic acid to form citric acid in the citric acid cycle. After one turn of the citric acid cycle, the citric acid regenerates the oxaloacetic acid molecule consumed.
Detailed explanation-3: -Krebs cycle or Citric acid cycle is the final pathway of oxidation of glucose, fats and amino acids. Hence, in Kreb’s cycle pyruvic acid is converted to CO2 and H2O .
There is 1 question to complete.