Question

describe about the life cycle of phage ?(5marks)
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Answer 1

Answer:

Explanation:

During infection a phage attaches to a bacterium and inserts its genetic material into the cell. After that a phage usually follows one of two life cycles, lytic (virulent) or lysogenic (temperate). Lytic phages take over the machinery of the cell to make phage components. They then destroy, or lyse, the cell, releasing new phage particles.

Answer 2

Explanation:

In lytic state the nucleic acid of the phage ( DNA or RNA) is not integrated in the genome of the host bacterium cell. Phage genome replicates independently of the host bacterium genome. Mature phage particles are produced and the host cell undergoes lysis. In lysogenic state the DNA of the phage is incorporated in the genome of the host cell and they are replicated together as a whole structure.