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11. which organelle is known as nonmembranous organelle in cytoplasm? a. plasma membrane b. smooth -surfaced reticulum (ser) c. rough

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11. Which organelle is known as nonmembranous organelle in cytoplasm? A. Plasma membrane B. Smooth -surfaced reticulum (sER) C. Rough -surfaced endoplasmic reticulum (rER) D. Microtubules

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The correct answer is D. Microtubules.Microtubules are nonmembranous organelles found in the cytoplasm of cells. They are composed of tubulin proteins and play a crucial role in maintaining the structure of cells, facilitating intracellular transport, and enabling cell division. Unlike the other options, microtubules do not have a membrane surrounding them, making them nonmembranous organelles.