A) single stranded DNA, as hereditary material
B) RNA as hereditary material
C) both DNA and RNA, as hereditary material
D) DNA as hereditary material
Correct Answer: A
Solution :
The E. coli phage \[\phi \times 174\] is ss-DNA phage. It does not contain any non-DNA component and is completely degraded by nuclease. RNA is present as genetic material in \[\phi \,2\] phages and \[\phi \,6\] phages and plant viruses also contain RNA as their genetic material. The phages which have double stranded DNA as their genetic material are T even phages of E. coli \[({{T}_{2}},{{T}_{4}},{{T}_{6}})\], T-odd phages of E.coli \[({{T}_{1}},{{T}_{3}},{{T}_{5}},{{T}_{7}})\] etc.
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