Virus Replication - L6-7

Question 1

Viruses can enter the host cell using any receptor present on surface of host cell

True or False?

Answer 1

False

Note: Each virus has its own specific receptor(s) which the virus can attach to an ultimately enter the host cell (Very specific)

Question 2

What are the different methods 
by which the virus can enter into 
the host cell? (Name 4)

Answer 2

Endocytosis
Surface-Fusion
Pore-mediated penetration
Antibody-Mediated penetration

Question 3

Which one of the following methods cannot be used by viruses for penetrating into host cell?

A. Receptor-mediated endocytosis
B. Membrane fusion
C. Pore-mediated penetration
D. Exocytosis

Answer 3

D. Exocytosis

Note: This is the reverse of endocytosis; used by some viruses to leave the host cell

Question 4

The Poly-A-tail is added to the 3’ - end of viral mRNA

True or False?

Answer 4

True

Question 5

Viruses can acquire the lipid envelope only from the cell membrane of infected host cells.

True or False?

Answer 5

False

Note: Some can acquire the lipid envelope from the nucleus, ER, golgi apparatus and this is called exocytosis