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Which of the following statements regarding animal cell membrane is correct?

Options

  1. AThey are composed of phospholipids only.
  2. BThey are composed of proteins only.
  3. CThey are composed of phospholipids and proteins only.
  4. DThey are composed of phospholipids, proteins and cholesterol (lipid).

Correct answer

D. They are composed of phospholipids, proteins and cholesterol (lipid).

Step-by-step solution

The cell membrane of animal cells is primarily composed of phospholipids, which form a bilayer structure. Embedded within or attached to this phospholipid bilayer are proteins that serve various functions like transport and signaling. Additionally, cholesterol molecules are interspersed among the phospholipids, contributing to the membrane's stability and fluidity. This composition of phospholipids, proteins, and cholesterol allows the cell membrane to regulate the passage of molecules and ions, maintain cell shape

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