Multiple choice

Which of the following components constitute plasma membrane?

  1. Proteins only

  2. Lipids only

  3. Proteins, carbohydrate and lipids

  4. Protein, Lipids, iron
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The plasma membrane (cell membrane) has a fluid mosaic structure composed of phospholipids (lipids), embedded proteins, and carbohydrates attached to proteins (glycoproteins) and lipids (glycolipids). These carbohydrates form the glycocalyx on the cell surface and are important for cell recognition.

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