S and T are end products of a biochemical pathway. Each stage in the pathway is catalysed by a different enzyme, which is encoded by specific genes. What may happen to the pathway if a mutation in gene 3 results in an inactive enzyme?
- AThere is a decrease in the activity of gene 1 and gene 2.
- BThere is an accumulation of product S.
- CThere is an increase in the rate of reaction of enzyme 4.
- DThere is an increase in the production of T.