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  4. Which one of the following is an exception to cell theory?

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Q. Which one of the following is an exception to cell theory?

Odisha JEEOdisha JEE 2011Cell : The Unit of Life

Solution:

Virus is an exception to cell theory as it lacks cell and protoplasm, the living substance in which all life processes take place. But it can reproduce in a living host cell, by using raw materials (nucleotides) and biosynthetic machinery (ribosomes, /RNA, enzymes) of the host cell.