Question

what molecule is associated with cell membranes?
a. hemoglobin
b. phospholipid
c. nucleotide
d. glucose

Explanation:

• Option A: Hemoglobin is a protein in red blood cells for oxygen transport, not related to cell membranes.
• Option B: Phospholipids form the lipid bilayer, the basic structure of cell membranes.
• Option C: Nucleotides are the building blocks of nucleic acids (DNA/RNA), not cell membrane components.
• Option D: Glucose is a sugar molecule (energy source), not associated with cell membrane structure.

Answer:

B. Phospholipid