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Viruses

Viruses
The most efficient way to enclose a space is within a/an

cube
sphere
icosahedron
helix

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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 MV-L2
Bateriophage T4
Bateriophage T2
Bateriophage M13

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Viruses
Which of the following is not true of virions?

Are extracellular
Reproduce independently
Contain RNA
Contain DNA

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Viruses
The viral DNA of the temperate phage, instead of taking over the functions of the cell's genes, is incorporated into the host DNA and becomes a prophage in the bacterial chromosome, acting as a gene. This happens in

lysogeny
none of these
spontaneous induction
lytic phase

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Viruses
The lysogenic state is governed by the activity of the regulatory region of the lambda phage genomes; this region is termed as

operon repressor
immunity repressor
immunity operon
none of these

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Viruses
The temperate phage that have no site specificity for insertion and may even be able to insert multiple copies of their DNA into a single bacterial chromosome is

Phage Mn
λ phage enzyme
λ DNA
Phage Mu

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