• Outline the properties of the bacterial genome.
• Outline the difference between vertical and horizontal gene transfer.
• Outline the four strategies used by bacteria to generate genetic diversity (mutation, transformation, transduction and conjugation).
• Describe how microorganisms exchange genes to alter their virulence.
• Outline the lytic and lysogenic cycles of bacteriophage replication.
A circular, self replicating piece of gene in the cytosol of viruses.
A small, circular, self replicating DNA segment in the cytosol of bacteria.
A small, circular, complex protein structure found in the plasma of bacteria.
Question 2
Question
A bacteria undergoes binary fission to create two genetically identical bacteria. Which method of gene transfer is this?
Answer
Vertical gene transfer
Horizontal gene transfer
Question 3
Question
In [blank_start]horizontal[blank_end] gene transfer, one trait is passed to another bacteria. In [blank_start]vertical[blank_end] gene transfer, the whole genome is passed on.
Answer
horizontal
vertical
vertical
horizontal
Question 4
Question
Which classic experiment demonstrates horizontal gene transfer?
Answer
Griffith's experiment
Koch's postulates
Avery's experiment
Question 5
Question
Which type of horizontal gene transfer involves a pilus used to make cell-to-cell contact?
Answer
Transduction
Transformation
Conduction
Question 6
Question
Which statement describes transduction?
Answer
Transfer of DNA from one bacteria to another via a bacteriophage
The uptake of naked short fragments of DNA by naturally transformable bacteria
Transfer of DNA via a pilus using cell to cell contact
Question 7
Question
The uptake of naked short fragments of DNA by naturally transformable bacteria is a form of horizontal gene transfer called transduction.
Answer
True
False
Question 8
Question
In the lytic cycle, the virus uses the [blank_start]bacterial[blank_end] cellular machinery to assemble more bacteriophages. When the capsid is assembled, the intention is for it to contain it's own [blank_start]viral[blank_end] DNA. However, plastids from the [blank_start]cytosol[blank_end] containing [blank_start]bacterial DNA[blank_end] can be incorporated into the bacteriophage too.
If this bacteriophage goes on to infect a different bacteria in a [blank_start]lysogenic[blank_end] cycle, the bacterial DNA from the first bacteria will be transferred to the second and [blank_start]incorporated[blank_end] into its DNA.