Question

which of the following biologically important compounds is the most water soluble? cholesterol vitamin c

Explanation:

Step1: Recall solubility principle

Water - soluble compounds have polar groups that can form hydrogen - bonds with water.

Step2: Analyze cholesterol

Cholesterol has a large non - polar hydrocarbon part and only one polar hydroxyl group, so it is poorly water - soluble.

Step3: Analyze vitamin C

Vitamin C has multiple hydroxyl ($-OH$) groups. These hydroxyl groups can form extensive hydrogen bonds with water molecules, increasing its water solubility.

Step4: Analyze the third compound

The third compound has a large non - polar hydrocarbon structure with no significant polar groups to interact with water, so it is poorly water - soluble.

Answer:

Vitamin C