Which of the following statements with respect to Endoplasmic Reticulum is incorrect ?

1. SER are the sites for lipid synthesis

2. RER has ribosomes attached to ER

3. SER is devoid of ribosomes

4. In prokaryotes only RER are present

Doubtly Asked 30 Oct 2026 NEET UG 2022 Practice test neet Save WhatsApp Report

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Answer: 4. In prokaryotes only RER are present

Key idea: Prokaryotes have no endoplasmic reticulum at all, because they lack membrane-bound organelles.

SER lacks ribosomes and makes lipids, so options 1 and 3 are true.
RER has ribosomes on its surface, so option 2 is true.
Option 4 says only RER is present in prokaryotes. This is wrong, since prokaryotes have no ER (their ribosomes are free, 70S). So option 4 is the incorrect statement.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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