Question

Assertion (A): Deposition of suberin on the walls makes them impermeable to water.

Reason (R): Cell wall is multilayered with usually three layers.

Answer 1

Correct option: (b)Both assertion(A) and reason(R) are true, but reason(R) is not the correct explanation for assertion.

• The cell wall is multilayered with usually three layers. The three layers are: middle lamella, primary cell wall and secondary cell wall.
• In some regions of the secondary cell wall, the deposition of a substance called suberin on the walls makes the walls impermeable to water.
• Therefore, both assertion and reason are true, but the reason is not the correct explanation for assertion.