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Q126
(IAS/2001)
Science & Technology › Basic Science (Physics, Chemistry, Biology) › Genetics and evolution
Answer Verified
Which organelle in the cell, other than nucleus, contains DNA ?
Result
Your answer:
—
·
Correct:
D
Explanation
Mitochondrion (option 4) is correct because mitochondria contain their own genetic material — small, typically circular mitochondrial DNA (mtDNA) present in multiple copies per organelle and inherited independently of nuclear chromosomes [1]. This feature is tied to their prokaryotic ancestry and endosymbiotic origin, which explains why mitochondria retain a genome and can replicate some components autonomously [1]. Other structures listed (centriole, Golgi apparatus, lysosome) do not harbour their own genomes; among eukaryotic organelles, only mitochondria and plastids/chloroplasts are known to contain DNA separate from the nucleus. Hence, mitochondrion is the only correct choice.
Sources
- [1] https://www.khanacademy.org/science/ap-biology/heredity/non-mendelian-genetics/a/mitochondrial-and-chloroplast-dna-inheritance
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