Question

Pyruvic acid enters the krebs cycle in the form of

Answer 1

The Krebs cycle occurs in the mitochondrion of a cell (see Figure 6-1). ... Prior to entering the Krebs cycle, the pyruvic acid molecules are altered. Each three-carbon pyruvic acid molecule undergoes conversion to a substance called acetyl-coenzyme A, or acetyl-CoA.

Answer 2

Answer:

Pyruvic acid enters the Krebs cycle in the form of Acetyl CoA.

Explanation:

What is a Krebs Cycle?

• The Krebs cycle, also known as TCA cycle (tricarboxylic acid cycle) or citric acid cycle is a series of reactions occurring in mitochondrial matrix with the help of enzyme in which acetyl CoA is oxidized to form carbon dioxide and coenzymes are reduced, which results in the generation of ATP in the electron transport chain.

• It is an eight-step process occurring in mitochondrial matrix under aerobic condition.

• Each pyruvate molecule (3-Carbons) loses a carboxylic group in the form of carbon dioxide.
• The remaining two carbons are transferred to enzyme CoA that produces acetyl CoA.
• This acetyl CoA is a 2-Carbon molecule attatched to coenzyme A which results in the release of carbon dioxide and reduces NAD+ to NADH.