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WorksheetsBacteriophages
Total questions: 20
Worksheet time: 10mins
Viruses that infect bacteria are called
caspids
bacteriophages
plastids
Viruses can infect host cells through either a lytic or lysogenic cycle.
True
False
The diagram above is a representation of
the lytic cycle
the lysogenic cycle
The lysogenic cycle of a virus infects the host cell, inserts its nucleic acid into the cell, commandeers the host cells genome, uses the host cells machinery to copy new viral parts, assembles parts into new viruses, and destroys the host cell by making it explode.
True
False
The lysogenic cycle is a viral mode of reproduction where it inserts its genome in the host's DNA, then remains dormant as time goes by. However, though it's dormant, it replicates itself by letting the host cell copy the virus' genetic material in cell division. If it experiences some sort of trigger, it will then go into assembly and eventually lysis.
True
False
The term used to define a virus that infects a bacteria is called a phage.
True
False
Which of the following statements about a bacteriophage is not true?
Bacteriophages have genomes consisting of DNA, RNA, or DNA and RNA.
The bacteriophages genome can consist of as many as 4 to several hundred genes.
The protein coat of a bacteriophage can be icosahedral, flilamentous, or head-tail.
The picture above is a representation of a/an
head-tail phage
enveloped phage
icosahedral phage
filamentous phage
During a lytic lifecycle of a bacteriophage, the host cell is killed.
True
False
Some phages can switch back and forth between lytic and lysogenic cycles.
True
False
In the Lytic cycle of bacteriophage infection, which process occurs first?
entry
attachment
DNA replication and protein synthesis
assembly
lysis
Which of the following statements is not true?
DNA replication occurs during mitosis
DNA replication occurs during interphase
DNA replication occurs between G1 and G2
DNA replication occurs during the synthesis stage
Which structures in a bacteria are necessary for protein synthesis?
lysosomes
mitochondria
ribosomes
peroxisomes
During lysis of a bacteria, expressed genes poke holes into the plasma membrane and cell wall of the bacterium. This allows water to flow into it, making it expand and eventually explodes due to overfilling.
True
False
The lysogenic cycle allows a phage to reproduce without destroying the host cell.
True
False
Which of the following statements about lysogeny is not true?
The lysogenic cycle is considered a dormant or latent stage
Once the genetic material is injected into the bacterium, the viral genome is not immediately copied and expressed to make proteins.
The viral genome combines with the bacterial genome and therefore, the phage nucleic acid is integrated into the bacterial genome
The host cell is destroyed during this cycle
A prophage is considered an active virus and is represented during a lysogenic cycle.
False
True
A trigger may cause a prophage to enter into a lytic cycle and the host cell is destroyed.
True
False
Fever blisters are caused by the Herpes Simplex I virus. Which is a lysogenic virus. Which of the following would be true of this virus?
It can remain dormant for a period of time until a trigger, such as UV light, causes a change to the lytic cycle.
The host cell is always destroyed.
Which is not true of bacteriophages and antibiotics?
Bacteriophages attack all types of cells
Because bacteriophages only attack host bacteria, they a good candidates for studying viruses
Bacteriophages can become antibiotic resistant
