Test #3- Viruses

Question 1

What are some properties of viruses?

Answer 1

linear
high host specifity
has a protein coat

Question 2

What are the steps of a virus in a host cell?

Answer 2

1) Entry and uncoding into host cell
2) Replication
3) Transcription and manufacture of capsid proteins
4) Makes new viruses

Question 3

Does bacteriophage have a tail?

Answer 3

no

Question 4

what are 2 cycles in the bacteriophage?

Answer 4

lytic cycle- host cells gets destroyed–ACTIVE
lysogenic cycle- DORMANT- phage DNA integrates into the bacterial chromosome, becoming a prophage –environment can trigger it to be active

Question 5

what happens with enveloped virus?

Answer 5

has a phospholipid bilayer

RNA–>DNA–>virus (this is opposite from normal)

Question 6

what are some characteristics about viruses?

Answer 6

short strands of circular, single standed RNA withoit protein coats

• ssRNA
• effects plants

Question 7

What does pathogenesis do?

Answer 7

RNA interface
degrades dsRNA
destroying the host mRNA affects synthesis of the host cell proteins
host cell destroys cell because of error

Question 8

What do prions do?

Answer 8

Proteinacious infectious particles
infectious proteins
causes MISFOLDING