Why are enzymes required for cellular metabolic pathways? A: Enzymes are consume
ID: 185152 • Letter: W
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.