All of the following organelles contain DNA except:
Correct answer: A. Ribosomes
- A. Ribosomes
- B. Chloroplast
- C. Nucleus
- D. Mitochondria
Explanation
The correct answer is Ribosomes because they do not contain DNA. Ribosomes are the sites of protein synthesis, made up of ribosomal RNA (rRNA) and proteins, and do not have their own genetic material. In contrast, Chloroplasts and Mitochondria contain their own DNA, resembling that of prokaryotes, and are capable of self-replication. The Nucleus also contains DNA, specifically the genomic DNA that encodes the majority of the cell's genetic information.
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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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