Question

Mitochondria and chloroplast are:
(a) Semi-autonomous organelles.
(b) Formed by a division of pre-existing organelles and they contain DNA but lack protein-synthesizing machinery.

Which one of the following options is correct?

• A. Both (a) and (b) are correct
• B. (b) is true but (a) is false
• C. (a) is true but (b) is false
• D. Both (a) and (b) are false

Answer 1

The correct option is C (a) is true but (b) is false

• Mitochondria are considered as semi-autonomous cell organelle due to the following counts: Mitochondria have their own DNA which can replicate independently.

• The mitochondrial DNA produces its own mRNA, tRNA and rRNA. The organelles possess their own ribosomes, called mitoribosomes.

The same applies to chloroplast as well.
Hence, option c is correct.