Question

multiple choice question
which is a major structural component of plasma membranes, and is also a precursor to steroid hormones, bile acids, and vitamin d?

• carbohydrates
• cholesterol
• glucose
• proteins

Explanation:

To solve this, we analyze each option:

• Carbohydrates: Primarily for energy, not a plasma membrane structural component or precursor to the listed molecules.
• Cholesterol: Is a major structural component of plasma membranes (maintaining fluidity) and is a precursor to steroid hormones, bile acids, and vitamin D.
• Glucose: A sugar for energy, not related to plasma membrane structure or those precursors.
• Proteins: Have roles in membranes (e.g., transport) but aren't the precursor to steroid hormones, bile acids, or vitamin D.

Answer:

B. Cholesterol