Question

Mitochondria and chloroplast are
(i) semi-autonomous organelles
(ii) formed by division of pre-existing organelles and they contain DNA but lack protein-synthesizing machinery

Which of the following statements are correct?

• A. Statement (i) is true but (ii) is false
• B. Statement (ii) is true but (i) is false
• C. Both statements are true
• D. Both statements are false

Answer 1

The correct option is A Statement (i) is true but (ii) is false

Both mitochondria and chloroplasts are called semi-autonomous organelles as they have their own machinery for the division. They both contain their own double-stranded circular DNA and ribosomes. They both arise from pre-existing organelles. They can divide by binary fission. They use most of the proteins synthesized by the cell but they do have protein-synthesizing machinery of their own (ribosomes) that can produce the required proteins.