Final Exam Written Anwsers

Question 1

What is the first step of the lyric cycle?

Answer 1

1.) Bacteriophage attaches to the cell wall of the bacterial cell, and injects it’s nucleic acid (DNA or RNA) into the cell.
-The protein coat and tail fibres never enter the host cell.

Question 2

What is the second step of the lytic cycle?

Answer 2

-The host cell DNA is destroyed or altered and is forced to replicate the viral nucleic acid.

Question 3

What is the third step of the lytic cycle?

Answer 3

3.) Protein coats or canids are made.

Question 4

What is the fourth step of the lytic cycle?

Answer 4

4.) New viruses are properly assembled by putting the nucleic acid inside the protein coats.

Question 5

What is the fourth step of the lytic cycle?

Answer 5

4.) New viruses are properly assembled by putting the nucleic acid inside the protein coats.

Question 6

What is the fifth step of the lytic cycle?

Answer 6

The bacteria cell ruptures and releases up to 300 new bacteriophages which may go on to attack other bacteria cells.

Question 7

What is an example of lytic bacteriophage?

Answer 7

-T4 bacteriophage, which attacks E.coli in the intestines.