BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Answer and Explanation: A) Steroid hormones are derived from cholesterol and can pass right into a cell to have effects is the TRUE statement.

Detailed explanation-2: -Steroid hormones are generally thought to pass easily across a plasma membrane into a cell, interacting once inside with soluble nuclear receptors, but recent experiments have demonstrated the importance of membrane-bound receptors in mediating the activity and the metabolism of steroid hormones.

Detailed explanation-3: -Lipid-derived (soluble) hormones such as steroid hormones diffuse across the membranes of the endocrine cell. Once outside the cell, they bind to transport proteins that keep them soluble in the bloodstream.

Detailed explanation-4: -(a) The classical model. The steroid hormone dissociates from its plasma carrier protein and diffuses across the cell membrane. After gaining entry to the cell, the free hormone binds to an intracellular receptor and alters gene transcription.