This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Function of Metabolism includes all except 
Select and explain. 
A. Extraction of nutrients from food, B. Breakdown of substrate, C. Equilibrium of biochemical with intracellular components, D. Using building blocks for synthesis
A: Extraction of nutrients from food
Answer: A: Extraction of nutrients from food 
Explanation: A i.e. Extraction of nutrients from foodExtraction of nutrients from food is not metabolism. Metabolism is oxidation of nutrients from food to produce energy.QMetabolism is a combination of two processes, namely:Anabolism : synthetic reactions that build up substancesCatabolism : reactions involving breakdown or oxidation of fuel molecules (breakdown of substrate)Both catabolism and anabolism proceed only until equilibrium is achieved. Equilibrium is a mechanism for biological control of rate at which these reactions occur.