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Viruses

Viruses
Which of the following virus is enveloped?

Polio
Adeno
Herpes
None of these

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Viruses
Which of the following is an example of rod-shaped viruses having their capsomeres arranged helically and not in the stacked ring?

Bateriophage T2
Bateriophage M13
Bateriophage MV-L2
Bateriophage T4

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Viruses
Reverse transcriptase is a useful enzyme to have when

nutrients are scarce
an RNA virus converts its RNA to DNA
spikes are forming in the new virus
there are no host cells present

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Viruses
During the first 10 minutes after injection of phage DNA, no phage can be recovered by disrupting the infected bacterium. This is termed as

latent period
burst size
eclipse period
rise period

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Viruses
The time from infection until lysis is called as

rise period
eclipse period
latent period
burst size

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Viruses
The first step in infection of a host bacterial cells by a phage is

adsorption
penetration
replication
absorption

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