Multiple choice

Plasma membrane is made up of

  1. carbohydrates and lipids

  2. proteins and lipids

  3. carbohydrates and proteins

  4. vitamins and proteins
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The plasma membrane is composed mainly of phospholipids (lipids) and proteins, arranged in the fluid mosaic model. Lipids form the basic bilayer structure, while proteins perform functions like transport, signaling, and enzymatic activity. Carbohydrates are present but are attached to proteins or lipids, not a major component.

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