Question

Glycerol enters the respiratory pathway after being converted to

• A. dihydroxyacetone phosphate
• B. fructose-1,6-bisphosphate
• C. glucose-6-phosphate
• D. amino acids

Answer 1

The correct option is A dihydroxyacetone phosphate

Fats get broken down into glycerol and fatty acids. Glycerol is first oxidised to dihydroxyacetone phosphate and is then converted to glyceraldehyde-3-phosphate with the help of isomerase enzyme. Glyceraldehyde-3-phosphate enters as a part of glycolysis. The resulting product of glycolysis is pyruvic acid which is oxidized to acetyl CoA. Acetyl CoA enters the Krebs cycle.

Glucose gets converted to glucose-6-phosphate and fructose-1,6-bisphosphate in the glycolysis pathway.