Why are enzymes required for cellular metabolic pathways? A: Enzymes are consume

Question

Why are enzymes required for cellular metabolic pathways?

A: Enzymes are consumed by metabolic pathways when reactants are converted to products.

B: A single enzyme can convert one substrate into many different products.

C: The enzymes that are present in a cell determine which metabolic reactions can occur in the cell.

D: An enzyme lowers the activation energy and therefore increases the rate of a reaction.

E: A cell can regulate metabolic pathways by controlling the enzyme concentration in the cell.

Explanation / Answer

Answer: D: An enzyme lowers the activation energy and therefore increases the rate of a reaction.

Option A is not correct because enzymes are not consumed. The substrate is converted to product, not the reactant.

Option B is not correct because it is not necessary that an enzyme will convert the substrate into many products.

Option C is not correct because enzyme doesn’t determine the metabolic processes, they catalyse the process.

Option E is not correct because cell cant regulates the metabolic process by regulating enzyme concentration only, Substrate concentration and reactant also have an important role in this process.

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