10
QuizMultiple Choice

Carbohydrates and Lipids

Question 10 • AISD-Biology A CR - (25-26)

Which statement about phospholipids is true?

Answer
A
Heads of phospholipids are hydrophobic.
B
Phospholipids allow any particle to freely pass through the phospholipid bilayer.
C
Tails of phospholipids are hydrophobic.
D
Phospholipids do not allow small particles to freely pass through the phospholipid bilayer.

Explanation

Phospholipids have hydrophilic heads that face the watery surroundings and hydrophobic tails that point inward, away from water. Therefore, the true statement is that the tails of phospholipids are hydrophobic. The bilayer is selectively permeable: some small particles can pass through, but not any particle freely.

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