Discussion
Which of the following cell organelles contain their own DNA ?
A. Plastids
B. Mitochondria
C. Nucleus
D. Vacuole
Choose the correct option :
Answer: C
The organelles with their own DNA are A, B and C: plastids, mitochondria and the nucleus.
The nucleus holds most of the cell's DNA in its chromosomes. Mitochondria and plastids (such as chloroplasts) also have their own small, circular DNA and ribosomes and can make some of their own proteins, which is evidence that they descend from free-living bacteria.
The vacuole is a membrane-bound sac storing water, food and wastes; it has no DNA. So options naming D are wrong, and 'B and C' leaves out the plastids.
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