Question

Which of the metabolites is common in respiration mediated breakdown of fats, carbohydrates and proteins?

• A. Glucose-6-phosphate
• B. Fructose 1,6-bisphosphate
• C. Pyruvic acid
• D. Acetyl Co-A

Answer 1

The correct option is D Acetyl Co-A

Acetyl coenzyme A or acetyl Co-A forms an integral part of cellular process. It provides carbon atoms within the acetyl group to the citric acid cycle (Krebs cycle) to be oxidized for energy production. Acetyl Co-A is produced during breakdown of carbohydrates through glycolysis as well as fatty acid oxidation and enters the citric acid cycle. During gluconeogenesis, protein's carbon skeletons are degraded to acetyl Co-A or acetoacetate which then enter into citric acid cycle. So, acetyl co-A is common in metabolism of carbohydrates, proteins and lipids.
So, the correct answer is option D.