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प्रश्न
Extranuclear chromosomes occur within various organelles, including ______.
पर्याय
lysosomes
chloroplasts
endoplasmic reticulum
all of the above.
MCQ
रिकाम्या जागा भरा
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उत्तर
Extranuclear chromosomes occur within various organelles, including chloroplasts.
Explanation:
Extranuclear chromosomes (also known as organelle DNA or cytoplasmic DNA) refer to genetic material found outside the cell's nucleus. In eukaryotic cells, these are specifically located within chloroplasts (in plants and algae) and mitochondria (in both plants and animals). These organelles are considered semi-autonomous because they contain their own circular DNA, ribosomes, and the machinery needed to replicate and synthesise some of their own proteins independently of the nuclear genome.
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