GK QUESTION#3734
Consider the following statements about the presence of DNA in a eukaryotic cell:
1. DNA is found only in the nucleus.
2. Mitochondria and plastids also contain their own DNA along with the nucleus.
3. Organelles having their own DNA can synthesize some of their proteins independently.
Which of the above statements is/are correct?
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Answer
C. 2 and 3 only
Show Explanation
Explanation
Statements 2 and 3 are correct in the usual cells possessing these organelles. Mitochondria and plastids contain DNA and translation machinery and synthesize some of their proteins. They still depend extensively on nuclear genes and imported proteins, so they are semiautonomous.