Virology

Question 1

What is the significance of plaques in regards to viruses?

Answer 1

• presence of bacteriophages, where they are eating bacteria

Question 2

What are the key features of viruses?

Answer 2

1. OBLIGATORY intracellular parasites
2. DNA or RNA
3. no ribosomes, no ATP (they steal hosts)
4. protein coat

Question 3

What is the different between an enveloped virus and a naked virus? Which one is more dangerous in terms of pathogens?

Answer 3

The enveloped viruses have their nucleic-acid surrounded by a lipid coating layer. The naked viruses just have their nucleic acid and the capsid.
-Naked viruses are harder to kill.

Question 4

What does tissue tropism refer to?

Answer 4

It refers to the way viruses must have the appropriate surface protein to match the host’s cells receptor.

Question 5

What is lysogeny?

Answer 5

It is referred to the latent stage of viruses because it is just the DNA replicating in the host cell.

Question 6

What is lysogenic?

Answer 6

The stage in which the DNA is replicating in the host cell.

Question 7

What is budding in regards to viral replication?

Answer 7

The replication process in which the virons released in host cells.

Question 8

Difference between antigentic shift and drift? Which is more concerning in pathology?

Answer 8

1. Shift > Complete new reassortment of Genome>outbreaks (concerning)
2. Drift > small changes>mutations

Question 9

What are prions and why do they result in the breakdown of the brain matter?

Answer 9

Prions are denatured proteins ( b: pleated sheet), the enzymes cannot break them down and instead break down the brain matter

Question 10

What does oncogenic mean?

Answer 10

Cancer causing