Answer:
The correct answer is B. It is involved in ribosome synthesis.
The Endoplasmic Reticulum (ER) is a complex organelle found in eukaryotic cells. It plays multiple important roles in cellular functions. Let's go through each statement to determine which one is incorrect:
A. It is involved in lipid synthesis: This statement is correct. The ER contains specialized regions called smooth ER that are responsible for lipid synthesis. Lipids are essential for various cellular processes.
B. It is involved in ribosome synthesis: This statement is incorrect. Ribosomes, which are responsible for protein synthesis, are not directly synthesized in the ER. They are actually synthesized in the nucleolus of the cell and then transported to the cytoplasm.
C. It is the post office of the cell: This statement is correct. The ER is often referred to as the "post office" of the cell because it is involved in the processing, modification, and sorting of proteins that are destined for various parts of the cell or for secretion outside of the cell.
D. Involved in detoxifying chemicals: This statement is correct. The smooth ER, which lacks ribosomes, is involved in detoxifying harmful substances such as drugs and alcohol. It contains enzymes that help in the metabolism and breakdown of these chemicals.
In summary, the incorrect statement about the Endoplasmic Reticulum is B. It is not involved in ribosome synthesis.
Step-by-step explanation:
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