Question

7)  Select the true statements about how bacteria can get new genetic material.  Circle all that apply.

1. Conjugation can occur only between bacteria of the same species.
2. In transformation, bacteria can pick up pieces of bacterial DNA from their surroundings.
3. It is necessary for viruses to be lysogenic for restricted transduction to occur.
4. In transduction, bacterial genes end up in viral capsids.
5. Bacterial conjugation can use pili, which act as pseudopods, engulfing genes from another bacterium to incorporate them into the cell’s genome.
6. HFr bacteria cannot produce pili and must depend on transduction to exchange genes.
7. Crossing over of genetic material may occur in bacteria as a result of conjugation or transduction..
8. In generalized transduction, viral genes are transferred via pili to other bacteria.

Answer 1

Statements which are true are-

In transformation, bacteria can pick up pieces of bacterial DNA from their surroundings.

Reason- this condition is called bacterial competance.

It is necessary for viruses to be lysogenic for restricted transduction to occur.

Reason- Lytic virus perform generalised transduction.

In transduction, bacterial genes end up in viral capsids.

Reason- by definition transduction process involve bacterial gene transfer due to virus.

Bacterial conjugation can use pili, which act as pseudopods, engulfing genes from another bacterium to incorporate them into the cell’s genome.

Reason- the pilli is called sex pilus and act as tube for genetic material transfer.

Crossing over of genetic material may occur in bacteria as a result of conjugation or transduction.

Rest statements are wrong by definition and the process of genetic material transfer.