alleryPyruvic acid is converted into which molecule before it enters the mitochondria for the Krebs cycle?
AAcetyl-Coenzyme-A
BGlycogen molecule
CRibose sugar unit
DLactic acid molecule
Answer & Solution
Correct answer: A. Acetyl-Coenzyme-A
1. Pyruvic acid formed in glycolysis is converted into acetyl-Coenzyme-A.
2. Two molecules of NADH2 and two of CO2 are released during this conversion.
3. Both acetyl-CoA molecules then enter the mitochondria for the Krebs cycle.
4. Lactic acid forms only in anaerobic respiration, so it is ruled out.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 2 "Life Processes in Living Organisms Part 1", p.22_
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