Organelles Found in Cytoplasm and Endoplasmic Reticulum

Subject : Biology

Question:

Which of these organelles can be found in the cytoplasm and on the surface of the endoplasmic reticulum?

A. Centrioles

B. Ribosomes

C. Centrosomes

D. Mitochondria

Expert Verified Solution:

The correct answer is B. Ribosomes. Ribosomes are small organelles responsible for protein synthesis. They can be found both freely floating in the cytoplasm and attached to the surface of the endoplasmic reticulum (ER), where they are known as rough ER due to their appearance. This attachment is crucial for synthesizing proteins that are either secreted from the cell or incorporated into the cell’s membrane or organelles.

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