Question

7. Which of the following is TRUE?

a) In the absence of oxygen, any molecule that can be converted to Acetyl-Co-A, can be a metabolic fuel.

b) In the presence of oxygen, any molecule that can be converted to Acetyl-Co-A, can be a metabolic fuel.

c) Any hydrocarbon molecule can be a metabolic fuel.

d) Any sugar can be processed through glycolysis

Answer 1

b) In the presence of oxygen, any molecule that can be converted to Acetyl-Co-A, can be a metabolic fuel

First, glycolysis produces pyruvate in the absence of oxygen, than, Aerobic respiration begins with the conversion of pyruvate to acetyl CoA, aerobic respiration begins in mitochondria of the cell and requires oxygen, Some organisms that have no mitochondria or no access to oxygen will undergo fermentation and produce ethanol or lactic acid in the cytosol of the cell.

Sugars like glucose can enter glycolysis, sugars like fructose and sucrose first must be converted to glucose before they can enter glycolysis.

Hydrocarbon cannot be metabolised in our body, it can be toxic if ingested.