Viruses Structure
Viral Replication Superficial
Viral Replication Deep
Human Health / Virus Analogy
100

What is a Capsid?

Protein coat around the virus that holds the genetic material 

100
What are the replication cycles for viruses?

Lytic and Lysogenic 

100
The first step of the lytic cycle 
Attachment 
100

Why are viruses referred to as parasites?

Virus live on organisms and rely on them to benefit - control their functions 

200

Does Viruses' genetic material contain DNA, RNA, or both?

Either DNA or RNA - not both! 

200
Lytic replication gets its name though

Lysis - the cell always ends up breaking open (virus can leave the cell

200
What triggers a viral DNA to enter the lytic cycle from the lysogenic cycle?
Changing conditions, stressors (e,g temp)
200

How could we deliver drugs or "Good" genes to organisms?

Gene therapy 

300
What is a Bacteriophage?

Viruses that infect bacterial cells 

300

Lysogenic replication gets its name though

injection of viral DNA inserted into host's DNA

300

How does viral DNA replicate in the lysogenic cycle?

When the host cell copies its DNA
300

How do antibiotics work on viruses?

THEY DONT!

400

Some viruses are surrounded by a ________ when a virus leaves a host cell

Envelope 

400
In the lysogenic cycle, viral DNA may stay 

dormant (for long periods of time! 

400

What is Biosynthesis in the lytic cycle? 

Viral DNA uses host enzymes to make more viral DNA and more capsids (host DNA is digested)

400
What is the main purpose of a vaccine? 

Increase immune memory, using a weakened part of the virus, build immunity with antibodies to "Be ready" for a potential future infection

500
Which part of the Bacteriophage attaches to the host cell? Which parts inject genetic material into the cell?
Tail, Sheath
500
What happens in Lysis? - The last stage of the lytic cycle

Viruses produce enzymes that opens up the cell, releasing many viruses

500
Why are viruses non-living?
Do not metabolize energy, lack cellular organization, rely on host for growth and development
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