Single Choice

Which of the following is not a cell?

ARed Blood Corpuscle (RBC)
BBacterium
CSpermatozoa
DVirus
Correct Answer

Solution

The virus is an acellular microscopic infection-causing agent. It has only a protein cover and a nucleic acid (either DNA or RNA). These are intracellular parasites that depend upon the host for nutrition.
So, the correct answer is option D.

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