virus

Question 1

structure: what is an intact viral particle?

Answer 1

virion

Question 2

structure: what does a viripn consist of?

Answer 2

• genome
• capsid
• envelope

Question 3

structure: what is the genome?

Answer 3

• a single or segmented, circular or linear molecule of nucleic acid
• single or double-stranded DNA or RNA
• codes synthesis of viral components and viral enzymes for replication

Question 4

structure: what is the capsid?

Answer 4

• also the core
• is a protein shell surrounding the genome
  -serves to protect and introduce genome to host

Question 5

structure: what is the envelope?

Answer 5

• outermost layer
  -protects genetic material
  -travels between host cells
  -not all viruses have envelopes

Question 6

structure: what are the glycoproteins?

Answer 6

• on the surface of the envelope
• serve to identify and bind to receptor sites on the host membrane

Question 7

growth: what happens when they infect a suitable host?

Answer 7

• they replicate themselves within the cell thousands of times

Question 8

growth: what temperature and humidity do viruses survive best in?

Answer 8

low temperatures
high humidity