Question

Circular single stranded DNA occurs in bacteriophage

• A. $T_2,T_4$
• B. $\varphi \times 174,M13$
• C. $T_3,\varphi 6$
• D. $\delta ,T_5$

Answer 1

The correct option is B $\varphi \times 174,M13$

Φ x 174 bacteriophage is a small icosahedral virus which contains a single-stranded, closed circular DNA molecule with 5,386 nucleotide bases. M13 is a bacteriophage which is composed of a circular, single-stranded DNA molecule enclosed in a thin flexible tube made up of about 2,700 copies of a single protein, p8 (major coat protein). Hence, circular, single-stranded DNA occurs in ΦX174 and M13 bacteriophages.

So, the correct answer is 'ΦX174, M13'.