ANATOMY

GENERAL ANATOMY

IMMUNE SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
During the lytic infection by a virus, the host cell is-
A
destroyed
B
copied
C
passed on to the lysogenic cycle
D
not affected
Explanation: 

Detailed explanation-1: -With lytic phages, bacterial cells are broken open (lysed) and destroyed after immediate replication of the virion. As soon as the cell is destroyed, the phage progeny can find new hosts to infect.

Detailed explanation-2: -The host cell is destroyed in the lytic cycle. The lytic cycle is a mode of viral replication in which a virus produces many copies of itself in the host cell and those copies proceed to burst the host cell on their way out. This bursting destroys the cell and may cause some of the symptoms of the viral infection.

Detailed explanation-3: -In the lytic cycle, a phage acts like a typical virus: it hijacks its host cell and uses the cell’s resources to make lots of new phages, causing the cell to lyse (burst) and die in the process.

Detailed explanation-4: -In a lytic cycle, the virus introduces its genome into a host cell and initiates replication by hijacking the host’s cellular machinery to make new copies of the virus. Once infection is complete, the newly replicated and assembled virus particles are released through lysis of the host cell into the surrounding waters.

Detailed explanation-5: -Most viral infections eventually result in the death of the host cell. The causes of death include cell lysis, alterations to the cell’s surface membrane and various modes of programmed cell death. Some viruses cause no apparent changes to the infected cell.

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