Question
Biology Question on Cell: the unit of life
Which one of the following is an exception to cell theory?
A
Fungi
B
Blue green algae
C
Virus
D
Bacteria
Answer
Virus
Explanation
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.