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Viruses

Viruses
Which one is not useful in the treatment of viruses except

antibodies
acyclovir
interferon
penicillin

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Viruses
The most complex type of bacterial viruses having hexagonal head, a rigid tail with a contractile sheath and tall fibers is morphologically classified as

A
C
B
D

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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

burst size
rise period
eclipse period
latent period

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Viruses
The time from infection until lysis is called as

latent period
burst size
rise period
eclipse period

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Viruses
Enveloped viruses have a __________ shape.

roughly spherical
complex
helical
icosahedral

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Viruses
Which of the following is not true of virions?

Reproduce independently
Contain DNA
Are extracellular
Contain RNA

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