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  4. A bacteriophage contain A = 22%, T=28%, G = 20% and cytosine = 30% bases composition. What is the genetic material of bacterial virus?

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Q. A bacteriophage contain A = 22%, T=28%, G = 20% and cytosine = 30% bases composition. What is the genetic material of bacterial virus?

VMMC MedicalVMMC Medical 2014

Solution:

Double helical DNA would have a base composition, in which, adehine is equal to thymine and cytosine is equal to guanine. The given DNA does not contain such base composition. So, virus must not have double stranded DNA as its genetic material. Being pyrimidine (C and T) and purine (A, G) the genetic material of bacteriophase is single standed DNA.