Multiple choice

Which of the following is true regarding cell walls and membranes? 

  1. Cell membranes and cell walls are rigid.

  2. Cell membranes and cell walls are fluid.

  3. Cell membranes are rigid and cell walls are fluid.

  4. Cell membranes are fluid and cell walls are rigid.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cell membranes are flexible and fluid, described by the fluid mosaic model, which allows them to change shape and control transport. In contrast, cell walls are rigid structures made of cellulose (in plants) that provide fixed support and protection. This structural difference allows plant cells to maintain a defined shape while cell membranes remain dynamic.

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