Biology

The correct answer is: C.Change in gene expression.

Explanation:

The final step in many signal transduction pathways involves changes in gene expression. After the signal is transduced through various intermediate steps like phosphorylation of proteins and activation of other proteins, the final response often involves changes in the expression of specific genes. This can lead to the production of new proteins or the regulation of existing proteins, which ultimately brings about the cellular response to the initial signal.

Here’s why the other options are incorrect: