Assertion (A): Plasma membrane contains bimolecular lipid layer, the surface of which is interrupted by proteins
Reason (R): Selective permeability of plasma membrane is explained with the help of fluid mosaic model.

Options

A. Both Assertion and Reason are true and Reason is the correct explanation for Assertion.
B. Both Assertion and Reason are true but Reason is not the correct explanation for Assertion.
C. Assertion is true and Reason is false.
D. Assertion is false and Reason is true.

Explanation

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that the plasma membrane consists of a bimolecular lipid layer with proteins embedded in it. This is a fundamental characteristic of the plasma membrane.
- The bimolecular lipid layer is composed of phospholipids arranged in two layers, with hydrophobic (water-repelling) tails facing inward and hydrophilic (water-attracting) heads facing outward.

2. **Understanding the Reason (R)**:
- The reason provided explains that the selective permeability of the plasma membrane can be understood through the fluid mosaic model.
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