Question

Which of the following statements about steroid hormones is true?

A. They bind with receptor proteins in the plasma membrane.
B. They bind to carrier proteins in order to be transported in the blood to
their target cells.
C. They are synthesized from epinephrine in the adrenal gland.
D. They are mostly derivatives of the amino acid tyrosine.

Answer 1

Steroid hormones are lipid-soluble and bind to carrier proteins in the blood, diffusing into target cells to regulate gene expression via intracellular receptors.

Step-by-step explanation:

The correct statement about steroid hormones is that they bind to carrier proteins in order to be transported in the blood to their target cells. Steroid hormones are lipid-soluble, allowing them to diffuse across the plasma membrane of the target cell. Once inside, they bind to intracellular receptors which may reside in the cytoplasm or in the cell's nucleus, and the hormone-receptor complex acts as a transcription regulator. This regulation alters gene expression and subsequently influences the synthesis of mRNA and the production of proteins, thus regulating specific cell processes.

Answer 2

B. They bind to carrier proteins in order to be transported in the blood to

their target cells.

Step-by-step explanation:

Steroid hormones are belongs to the class of chemical compound called steroid. Steroid hormones are majorly secreted by three glands - ovaries, testes and adrenal cortex.

Steroid hormones are released in the blood and are allowed to bind to the specific carrier proteins such as corticosteroid-binding globulin and albumin which helps them to carry to the target cells for the functioning.

The steroid hormone binds to receptor proteins in the target cell and not in the plasma membrane

Hence, the correct answer is "B. They bind to carrier proteins in order to be transported in the blood to their target cells."