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Q: Which cell organelle has its own DNA and ribosome?
  • A. Leucoplast
  • B. Chromoplast
  • C. Vacuoles
  • D. Mitochondria
Correct Answer: Option D - Mitochondria and chloroplast contain their own DNA and ribosomes. Mitochondria and chloroplasts likely began as bacteria that were engulfed by larger cells (the endosymbiont theory). They have their own DNA and Ribosomes because of which they are able to synthesize some of their own proteins and replicate independent of the nucleus.
D. Mitochondria and chloroplast contain their own DNA and ribosomes. Mitochondria and chloroplasts likely began as bacteria that were engulfed by larger cells (the endosymbiont theory). They have their own DNA and Ribosomes because of which they are able to synthesize some of their own proteins and replicate independent of the nucleus.

Explanations:

Mitochondria and chloroplast contain their own DNA and ribosomes. Mitochondria and chloroplasts likely began as bacteria that were engulfed by larger cells (the endosymbiont theory). They have their own DNA and Ribosomes because of which they are able to synthesize some of their own proteins and replicate independent of the nucleus.