Home › Maharashtra SSC (Class 10) › Biology › Life Processes in Living Organisms Part 1 › Pyruvic acid is converted into which molecule be…
Pyruvic 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_
Related questions
Which of these is NOT a function for which mitosis is essential?Why are all four daughter cells produced by meiosis genetically different from the parent When carbohydrates are insufficient due to fasting, how does the body finally extract enerIn which phase of mitosis do the nuclear membrane and nucleolus start to disappear while cWhy do seeds switch to anaerobic respiration when the soil is submerged under water duringIn the electron transfer chain reaction, what is the total ATP yield from two NADH2 and twWhich set of components makes up an ATP molecule?During the conversion of pyruvic acid to acetyl-CoA, which gas is released?