Question

Is the reproduction cycle for the Norwalk Virus lytic or lysogenic?

Answer 1

As the lysogenic cycle allows the host cell to continue to survive andreproduce, the virus is reproduced in all of the cell's offspring. An example of a bacteriophage known to follow thelysogenic cycle and the lytic cycle is the phage lambda of E. coli.

Answer 2

$\huge\text{\underline{Virus:}}$


$\sf{\underline{Reproduction:}}$

It is of two main types: Phagic and Pinocytic


(a) $\text{\underline{Phagic\:Reproduction:}}$

⚫Only nucleic acid of virus enters the host cell. It is further of two types:


(i) $\sf{\underline{Lyric\:cycle:}}$ Occurs in virulent phages.

⚫$\sf{Example:}$ $T_{4}$ bacteriophages.


(ii) $\sf{\underline{Lysogenic\:cycle:}}$ Occurs in temperature viruses.

⚫$\sf{Example:}$ λ phage.


(b) $\text{\underline {Pinocytic\:Reproduction:}}$

⚫It is found in viruses like TMV, HIV, Hepatitis B etc., in which whole of virus particle enters host cell except envelope (if present).