Which of the following statements is correct about endoplasmic reticulum?
I. It is a large network of membrane-bound tubes and sheets.
II. It is similar in structure to the plasma membrane.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Both I and II.
- The endoplasmic reticulum (ER) is a large, dynamic structure that serves many roles in the cell including calcium storage, protein synthesis and lipid metabolism.
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The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function.
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The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.