Question

which of the following is a true statement about biomolecules? a carbohydrates are hydrophilic and therefore they cannot mix well in water. b lipids are hydrophilic and therefore they mix well in water. c carbohydrates are hydrophobic and therefore they cannot mix well in water. d lipids are hydrophobic and therefore they cannot mix well in water.

Explanation:

• Analyze Option A: Hydrophilic substances are water - attracting and mix well with water. Carbohydrates are hydrophilic, so they should mix well in water. Thus, Option A is wrong.
• Analyze Option B: Lipids are known to be hydrophobic (water - repelling), not hydrophilic. So they do not mix well with water. Option B is wrong.
• Analyze Option C: Carbohydrates are hydrophilic, not hydrophobic. So they can mix well with water. Option C is wrong.
• Analyze Option D: Lipids are hydrophobic, meaning they repel water. So they cannot mix well in water. This statement is correct.

Answer:

D. Lipids are hydrophobic and therefore they cannot mix well in water.