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Cell: The Unit of Life
Semi-autonomous Organelles
2 questions from 2 papers, each with its answer.
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Appears in
Concepts tested
- DNA in mitochondria and chloroplasts
- DNA in mitochondria and plastids
All Questions
2001 AIPMT 1 question
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Extranuclear chromosomes occur in : -Mitochondria and chloroplasts are semi-autonomous organelles. They contain their own circular DNA (extranuclear chromosomes), ribosomes (70S) and protein synthesising machinery.
Peroxisomes, ribosomes and lysosomes do not contain DNA.
So extranuclear chromosomes occur in chloroplasts and mitochondria.
2000 AIPMT 1 question
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Extranuclear DNA is found in :Mitochondria and chloroplasts contain their own circular DNA, 70S ribosomes and machinery for protein synthesis; they are semi-autonomous.
Lysosomes, Golgi bodies and ER do not contain DNA.
So extranuclear DNA is found in chloroplasts and mitochondria.