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Viruses MCQ - Multiple Choice Question and Answer

Viruses MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 1
Viruses were discovered by

Stanley
Iwanowiski
Twort
Herelle

Question No : 2
Viruses are defined as

a buch of genomes which are looking for a suitable host for replication
micro-organisms which contains DNA only
smallest micro-organisms causing disease
micro-organisms which contains RNA only

Question No : 3
RNA particles causing symptoms like those of viral diseases is known as

virion
vira
viroid
none of these

Question No : 4
Coliphage mX 174 contains:

double stranded RNA
single stranded DNA
double stranded DNA
single stranded RNA

Question No : 5
Viruses differ from living organisms in that, they

can grow inside a living host
can multiply inside a living host
can undergo mutation inside a living host
are non-cellular

Question No : 6
Virus which attacks E.coli is called

bacteriophage
coliphage
phytophage
zoophage

Question No : 7
Virus is a.............................. stage between living and non-living.

balanced
threshold
transitional
none of these