Among followings which cellular organelle contains circular DNA similar to those found in bacteria?
Correct answer: C. Chloroplast
- A. Ribosome
- B. Lysosome
- C. Chloroplast
- D. Nucleus
Explanation
Chloroplasts and mitochondria are unique among cellular organelles as they possess their own circular DNA, similar to bacterial DNA. This is a key characteristic that allows them to function semi-autonomously within the cell. In contrast, ribosomes and lysosomes do not contain any DNA, and the nucleus, while it does contain DNA, has it in a linear form organized into chromosomes. Therefore, the correct answer is chloroplasts, as they not only perform photosynthesis but also have the circular DNA structure akin to that of prokaryotes.
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About Cell Structure and Function
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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