Question

Which of the following does not have DNA?

• A. Nucleus
• B. Mitochondria
• C. Ribosomes
• D. Chloroplast

Answer 1

The correct option is C Ribosomes

Deoxyribonucleic acid (DNA) encodes the genetic instructions which are used in development and functioning of all living organisms. It is the hereditary material of the cell which carries encoded information from one generation to the next.

The nucleus of the cell contains a majority of the cell's genetic material, i.e., DNA in the form of DNA-protein complex called chromatin.

Both mitochondria and plastid possess their own genetic material and ribosomes. The mitochondrial DNA and plastid DNA possess genes which produce the proteins necessary for the functioning of mitochondria and plastids respectively.

Ribosomes are dense, spherical and granular particles which occur freely in the matrix (cytoplasm) or remain attached to the rough endoplasmic reticulum. Chemically, the major constituents of ribosomes are the ribonucleic acid (RNA) and proteins. Ribosomes are membrane fewer cell organelles. Ribosomes do not show traces of DNA.
So, the correct answer is option C.