Read the assertion and reason carefully to mark the correct option
in question.
Assertion: In the cell membrane , the non-polar tail of saturated hydrocarbons is protected from the aqueous environment.
Reason: The lipids are arranged within the membrane with polar
head towards the outer sides and the hydrophobic tail towards the inner part.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

To solve the question regarding the assertion and reason related to the cell membrane, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "In the cell membrane, the non-polar tail of saturated hydrocarbons is protected from the aqueous environment." This implies that the structure of the cell membrane is such that the non-polar (hydrophobic) tails are shielded from water.

2. **Understanding the Reason**: The reason provided is "The lipids are arranged within the membrane with polar head towards the outer sides and the hydrophobic tail towards the inner part." This describes the arrangement of phospholipids in the cell membrane, where the hydrophilic (polar) heads face the aqueous environment, while the hydrophobic (non-polar) tails are oriented inward, away from water.

3. **Analyzing the Assertion**: The assertion is correct because the non-polar tails of the lipids are indeed shielded from the aqueous environment due to their orientation in the membrane structure.

4. **Analyzing the Reason**: The reason is also correct as it accurately describes the arrangement of lipids in the cell membrane. The polar heads face outward towards the water, and the hydrophobic tails face inward, away from the water.

5. **Evaluating the Relationship**: Since both the assertion and reason are correct, we need to determine if the reason correctly explains the assertion. The reason explains why the non-polar tails are protected from the aqueous environment, thus supporting the assertion.

6. **Conclusion**: Both the assertion and reason are true, and the reason is the correct explanation of the assertion.

### Final Answer:
The correct option is **A**: Both assertion and reason are true, and reason is the correct explanation of assertion.

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