OVERVIEW OF THE IMMUNE SYSTEM
VIROLOGY AND IMMUNITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Infection
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Replication
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Synthesis
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Assembly
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Lysis
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Detailed explanation-1: -In the lytic cycle, the phage replicates and lyses the host cell. The third stage of infection is biosynthesis of new viral components. After entering the host cell, the virus synthesizes virus-encoded endonucleases to degrade the bacterial chromosome.
Detailed explanation-2: -The first stage is entry. Entry involves attachment, in which a virus particle encounters the host cell and attaches to the cell surface, penetration, in which a virus particle reaches the cytoplasm, and uncoating, in which the virus sheds its capsid.
Detailed explanation-3: -In the lytic cycle, the virus attaches to the host cell and injects its DNA. Using the host’s cellular metabolism, the viral DNA begins to replicate and form proteins. Then fully formed viruses assemble. These viruses break, or lyse, the cell and spread to other cells to continue the cycle.
Detailed explanation-4: -Step 1: Adsorption. Attachment sites on the bacteriophage adsorb to receptor sites on the host bacterium (see Figure 10.7A. Step 2: Penetration. Step 3: Replication. Step 4: Maturation. Step 5: Release. 09-Apr-2022