All cell membranes are composed of:
Correct answer: C. Lipo protein
- A. Proteins
- B. Lipids
- C. Lipo protein
- D. Cellulose
Explanation
Lipids → mainly phospholipids, form the bilayer (structural framework).Proteins → embedded or attached, responsible for transport, receptors, enzymes.Together, they form a lipoprotein complex.All cell membranes are composed of lipoproteins (lipids + proteins).
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Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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