Question

question: 12
the table below shows the effect of enzyme x on a substrate over time.
the data in the table reveal that the role of the enzyme is to facilitate a reaction. the data
further reveal that

Explanation:

Enzymes are biological catalysts. Catalysts are not consumed in a reaction. Once the substrate is exhausted (no more substrate to react), the enzyme cannot cause another reaction (as there is no substrate). When substrate is renewed, the enzyme can act again (as it was not used up in the previous reaction). Option A is correct as enzymes don't transform products back to substrate (so C is wrong), they don't prevent substrate - product transformation when substrate is renewed (so D is wrong) and the reaction conditions (like substrate concentration over time etc.) might change so it won't be exactly the same as before (so B is wrong).

Answer:

A. once the supply of the substrate is exhausted, the enzyme cannot cause another reaction to occur.