Which of the following organelles is NOT bounded by a membrane?
Correct answer: A. Ribosome
- A. Ribosome
- B. Lysosome
- C. Mitochondrion
- D. Golgi apparatus
Explanation
A ribosome is a complex of ribosomal RNA and protein with no surrounding membrane at all, which is why it is found in prokaryotes as well as eukaryotes. Lysosomes and the Golgi apparatus each have a single membrane, and mitochondria have two. Nucleoli and centrioles are the other common non-membranous structures.
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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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