Question

Which one of the following hormones never reaches to cytoplasm ?

• A. Estrogen
• B. $FSH$
• C. Progesterone
• D. Testosterone

Answer 1

Answer: (B)

$FSH$ is a proteinaceous hormone. It does not enter its target cells, thus, it never reaches to cytoplasm. Instead, it binds to the receptor present on the cell membrane and activates a membrane bound enzyme that causes conversion of $ATP$ to $cAMP$. This then alters the activities of enzymes in the cytoplasm.