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

Which of the metabolites is common to respiration mediated breakdown of fats, carbohydrates and proteins?
  1. Glucose-6-phosphate
  2. Fructose 1, 6-bisphosphate
  3. Pyruvic acid
  4. Acetyl Co-A

Solution

Acetyl Co-A is common to respiration mediated breakdown of fats, carbohydrates and proteins. Glucose and fructose are phosphorylated to give rise to glucose6-phosphate by the activity of the enzyme hexakinase. Glucose-6-phosphate then converts into fructose 6 phosphate and further to fructose 1-6-bisphosphate. Pyruvic acid is the end product of glycolysis.

Asked in: NEET 2013 (All India)

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