Viruses

Question 1

Viruses

Answer 1

They are little more than a few dozen genes surrounded by a protein coat

Not a true cell

Question 2

What can’t viruses do?

Answer 2

Grow, repair themselves, feed, or move on their own

Question 3

Active viruses

Answer 3

Only when they make contact with host cell

Question 4

Parasites

Answer 4

Viruses are parasites because they take over the host cell to make more copies of themselves

Question 5

Lytic cycle

Answer 5

Viruses enter host cell and tricks it into making new virus particles

Question 6

Lysogenic cycle

Answer 6

Viral genes enter host cell, but do not reproduce right away.
They insert themselves into host cell’s chromosomes.

Question 7

Prophage

Answer 7

Viral genes

Question 8

Viral diseases 1

Answer 8

1. Sexually transmitted infections
   Human Immunodeficiency virus (HIV)
   Herpes
   Human Papilloma virus (genital warts)

Question 9

Viral diseases 2

Answer 9

Other viral infections

Cold, flu, West Nile virus, rabies, yellow fever, Ebola, Hepatitis (A,B,C)

Question 10

Viral infections 3

Answer 10

Some viruses linked to cancer
Human Papilloma virus (HPV) is leading cause of cervical cancer
Hepatitis is cause of liver cancer

Question 11

Viral specificity

Answer 11

Refers to what hosts the virus is capable of infecting. Most viruses are specific to only 1 or few types of cells.
Eg. Cold virus only infects cells found lining respiratory track.
Ravies can affect any mammal