Question

A single stranded DNA is present in which of the following organism?

• A. TMV
• B. Salmonella
• C. Coliphage $\varphi \times 174$
• D. Bacteria

Answer 1

The correct option is C Coliphage $\varphi \times 174$

A single-stranded DNA is present in Coliphage 174. The $\varphi$ X 174 bacteriophage was the first DNA based genome to be sequenced. This bacteriophage has a circular single-stranded DNA genome of 5386 nucleotides encoding 11 proteins. Of these 11 genes, only 8 are essential to viral morphogenesis.

So, the correct answer is option C.