Question

Which of the following differentiates mammalian cell membrane and plant cell membranes?

• A. Plant membranes contain chlorophyll, while mammalian membranes do not.
• B. Mammalian membranes contain cholesterol, while plant membranes do not.
• C. Plant membranes ion channels, while mammalian membranes do not.
• D. Mammalian membranes are attached to a cytoskeleton, while plant cells are not.
• E. Plant membranes contain cellulose, while mammalian cell membranes do not.

Answer 1

Answer: (B)

Mammalian membranes contain cholesterol, while plant membranes do not.

• Chlorophyll is a photosynthetic pigment, present in the chloroplast of plant cells, not in the cell membrane.
• Ion channels are integral proteins, that serve in facilitated diffusion and are found in both plants and animal cells.
  
• Cytoskeleton serves as structural support in all cells.
• Cellulose is a constituent of the plant cell wall.
• Cholesterol is abundant in mammalian cell membranes while plant cells have phytosterols.
  

Hence, the correct answer is option B.