Test 4

Question 1

Animal viruses lck tails or tail fibers

Answer 1

Therefore, attachment by glycoproteins spikes
Other attachment molecules possible
Capsomeres in nineveloped viruses
Fivers in adenoviruses

Question 2

Explain Phagocytosis

Answer 2

Virus attaches to receptors
Host cell phagocytosis it
Fusion occurs inside cell with phagosome

Question 3

What are Oncogenes?

Answer 3

Oncogenes are genes whos products can cause cancers

Question 4

Explain Oncogenes

Answer 4

Viruses carrying copies of oncogenes
Part of viral genomes
Viral stipulation of host oncogenes
sTIMULATING THE HOST CELL TO REPLICATE
Viral interference with tumor repression
Inhibiting the cell from stopping cell replication
I.e. turning off the “off” genes

Question 5

What are Prions?

Answer 5

Infectious proteins