A) bacteriophage
B) bacteria
C) virus with single stranded DNA
D) virus with single stranded RNA
Correct Answer: C
Solution :
Virus are made up of nucleic acid (RNA or DNA) and proteins. These are connecting link between non-living and living. Virus was discovered by Iwanowsky. Polio is caused by single stranded RNA containing entero virus. Polio vaccine is used for prevention of polio in children (up to age of 5 years). Bacteriophage is a virus which attack on bacteria.
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