Lec4

Question 1

is a variation occurs in the antigenic structures due to a sudden genetic reassortment between two or more closely related influenza viral strains.

Answer 1

antigenic shift

Question 2

is a genetic variation that occurs in the antigen structures due to a point mutation happens in the genes of the H and M within the viral genome over the year

Answer 2

antigenic drift

Question 3

DNA viruses mutate faster than RNA viruses.
T/F?

Answer 3

F, RNA faster than DNA.

Question 4

is the exchange of part of genome between two viruses in the infected cell.

Answer 4

Virus recombination

Question 5

Viruses with segmented genomes can also undergo recombination by acquiring an entire genome segment from another virus.

Answer 5

Virus reassortment

Question 6

• virus infecting humans
• result of a reassortment

Answer 6

H5N1

Question 7

Evolution mechanisms:

Answer 7

1- Random mutations (genetic drift)
2- Recombination (genetic shift)
3- Reassortment (genetic shift)

Question 8

Bound to RNA genome to make up nucleocapsid

Answer 8

Nucleocapsid protein

Question 9

Interact with membrane protein to form viral envelope

Answer 9

Envelope protein