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WorksheetsViruses
Total questions: 20
Worksheet time: 41mins
The outer protein coat of a virus is called a
DNA core.
capsid.
bacteriophages.
endospores.
What is the basic structure of a virus?
DNA or RNA surrounded by a protein coat.
a capsid surrounded by a protein coat.
a tail sheath surrounded by tail
a tiny cell surrounded by a cell.
Viruses are prokaryotes?
True
False
Viruses are ______________
producers.
consumers.
parasites.
decomposers.
The study of viruses is a part of biology because
they belong to the kingdom Eubacteria
they are about to become extinct.
they are living organisms.
they are active inside living cells.
Which occurs during the lysogenic cycle of a virus infection?
Viral genes instruct the host cell to make more viral protein capsids and enzymes needed for viral replication.
The virus produces active, immediate infections.
The virus takes over the cell, makes copies of itself, and usually kills the host cell.
The viral genes become a part of the host cell DNA, so the cell continually makes more copies of the virus.
The flu is caused by a virus.
true
false
Viruses can affect which types of organisms? SELECT ALL
plants
animals
bacteria
bricks
Viruses cause infection by
producing toxins that harm the body.
reproducing independently inside the body.
forming endospores.
entering body cells and replicating.
If Andy is feeling symptoms from a virus that he contracted, the virus must be in the
lytic cycle
lysogenic cycle
the capsid bursts
the virus becomes dormant
Which cycle of a virus is most destructive to the host?
lytic cycle
lysogenic cycle
TRUE or FALSE:
Viruses are smaller than the hosts they infect.
True
False
Animal viruses often infect only specific host cells because
they must have the same DNA as their host cell.
the host cell has specific receptors for the glycoproteins on the virus.
viruses have receptors for the host cells glycoproteins.
the enzymes of the virus can attach only to specific host cells.
The instructions for making new copies of a virus are
a part of a virus's capsid.
coded in surface proteins attached to the protein coat.
coded in either RNA or DNA.
found only in bacteriophages.
In which type of cell cycle(s) does viral DNA become integrated into the host cell's DNA?
lytic
lysogenic
neither lytic nor lysogenic
lytic and lysogenic
What is a bacteriophage?
A disease fighting virus.
A bacteria that attacks viruses.
A disease causing bacterium.
A virus that attacks bacteria.
