Question

Which of the following statements are true about $\varphi \times 174$ bacteriophage?
(A) 12 capsomeres in a capsid.
(B) Genetic material is a single stranded DNA.
(C) Tail is absent and head is icosahedral.

• A. B and C
• B. A and C
• C. A and B
• D. A, B and C

Answer 1

The correct option is D A, B and C

The $\varphi$ X 174 bacteriophage was the first DNA-based genome to be sequenced. This bacteriophage has a [+] circular single-stranded DNA genome of 5,386 nucleotides encoding 11 proteins. Of these 11 genes, only 8 are essential to viral morphogenesis. Capsid is made of 12 capsomeres. it is a single stranded DNA virus. Head is icosahedral and tail is absent. Thus, the correct answer is option D.