Spherical or tubular membranes which separate the material present in endoplasmic reticulum from that of cytoplasmic material are called__________?
Correct answer: B. Cisternae
- A. Cytosol
- B. Cisternae
- C. Polysomes
- D. Cristae
Explanation
Cisternae are the flattened or tubular membrane-bound spaces of the endoplasmic reticulum that enclose its lumen and separate it from the cytosol. Cristae are folds of the inner mitochondrial membrane, while cytosol is the fluid portion of the cytoplasm. Students may choose cristae because both terms describe internal membranes, but cristae belong to mitochondria, not ER.
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About Cytoplasmic Organelles
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
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