DNA is not present in : - DASH

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Question

DNA is not present in :

Nucleus

Chloroplast

Mitochondria

Ribosomes

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Explanation for the Correct Answer 1. Introduction Cells contain different organelles and structures, some of which carry their own genetic material in the form of DNA. This question asks which structure among the given options does not contain DNA. 2. Presence of DNA in Nucleus, Chloroplast, and Mitochondria Nucleus: The nucleus is the control center of the cell and houses the cell’s primary genetic material in the form of DNA. Chloroplast (in plant cells): Chloroplasts have their own circular DNA, which is necessary for some of their functions involved in photosynthesis. Mitochondria: Mitochondria also contain their own circular DNA, which enables them to direct the synthesis of some of their proteins. 3. Why Ribosomes Do Not Have DNA Ribosomes are the cellular machinery responsible for protein synthesis. They are made up of ribosomal RNA ($rRNA$) and proteins. Ribosomes do not have a membrane-bound structure, nor do they house any genetic material. They read the genetic code carried by messenger RNA ($mRNA$) but do not contain DNA themselves. 4. Conclusion Since ribosomes do not contain DNA, they are the correct answer to the question. While the nucleus, chloroplasts, and mitochondria all possess DNA, ribosomes function only as the site where proteins are assembled, relying on the genetic information carried by other molecules rather than their own.

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Parent Quiz 797309

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