Which one of the following is not a constituent of the cell membrane?
Correct answer: B. Proline
- A. Glycolipids
- B. Proline
- C. Phospholipids
- D. Cholesterol
Explanation
Proline is an amino acid, not a component of the cell membrane. Membrane structure is mainly composed of lipids and proteins, while proline is involved in protein synthesis.
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Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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