Question

Read the statements given below and choose the correct option-

Assertion: The Endoplasmic Reticulum, which lacks ribosomes is called a Smooth Endoplasmic Reticulum (SER).

Reason: SER is Mainly Involved in Protein Synthesis.

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

Answer 1

The correct option is D

Assertion is correct but Reason is incorrect.

The correct answer is D.

Assertion statement:

1. Smooth ER doesn't contain ribosomes.
2. The absence of ribosomes gives them a smooth appearance, hence called Smooth ER.

Reason statement:

1. The SER is considered "smooth" because, without ribosomes on its surface, they appear smooth.
2. The main function of SERs is the synthesis of phospholipids.
3. However, they also play a pivotal role in the synthesis of steroid hormones.
4. RER (Rough ER) is involved in protein synthesis.

Final answer: (D) Assertion is correct but Reason is incorrect.