Which of the following correctly compares steroid and nonsteroid hormones              a.  nonsteroid hormones enter the nucleus and affect protein synthesis while steroidal hormones do not.    b.  neither steroid nor nonsteroid hormones enter the cell membrane.    c.  steroid hormones bind to receptors on the outside of the cell and rely on secondary messengers while nonsteroidal hormones do not.    d.  steroid hormones enter the nucleus and affect protein synthesis, while nonsteroidal hormones do not.

D. Steroid hormones enter the nucleus and affect protein synthesis, while nonsteroidal hormones do not.

Explanation:

Steroid hormones are synthesized from lipids, such as cholesterol. They are fat soluble and thus can enter the nucleus and affect protein synthesis.

Non-steroid hormones are synthesized from amino acids. They are water soluble and thus cannot enter the nucleus of target cells. Instead, a non-steroid hormone binds to receptors on the outside of the cell and rely on secondary messengers.

The correct answer is option D.

Explanation:

Steroid hormones are basically are lipid-soluble molecules and derived from cholesterol. Steroid hormones pass through cell membranes because they're lipid soluble, and attach to a receptor that is present inside the cell, entering the nucleus, binding to DNA, and beginning gene transcription and translation and produce protein.

Nonsteroid hormones are water soluble hormones that do not enter the cell membrane but bind to cell membrane receptors that produce a chemical signal inside the target cell.

Thus, the correct answer is option D.

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