Question

What of the following is true about the genetic material of a prokaryotic cell?

A

Lacks histones

B

Not enveloped by nuclear membrane

C

Composed of a single circular DNA molecule

D

All of the above

Medium

Solution

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Correct option is D)

Prokaryotes are unicellular organisms. The word prokaryote comes from the Greek which means primitive nucleus  In prokaryotes, the genetic material consists of single circular DNA molecule lying entangled in the nucleoid. It is not bounded by a definite nuclear membrane. Histones are water-soluble proteins rich in arginine and lysine that help in DNA packaging in chromosomes. Prokaryotic cells lack histone proteins. Some of the examples of prokaryotic cells are bacteria, cyanobacteria etc
So, the correct answer is 'option D'.

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