Question

1.
Choose the best answer.

_________ is an example of a retrovirus.

HIV

T4

Vaccine

RNA
2.
Choose the best answer.

What is an infective agent that typically consists of a nucleic acid molecule in a protein coat?

bacteria

cyanobacteria

eubacteria

virus
3.
Choose True or False.
Finding a cure for AIDS has been so difficult because the HIV virus mutates fairly easily.


False

True
4.
Select 2 that apply.

A parasite is an organism that requires another organism to ____________ and ___________, most often to the harm of the host organism.

reproduce

multiply

create

function

live
5.
Choose the best answer.

Some viruses use a ____________ cycle before beginning the lytic cycle in which the viral DNA is inserted into the host's DNA.

helical

lytic

lysogenic

binal
6.
Choose the best answer.

A person is considered to have AIDS when the T-helper count drops below ____________ cells per one milliliter of blood.

100,000

200,000

300,000

400,000
7.
Choose the best answer.

The average length of time that passes between a person being infected with HIV to having AIDS is ______________.

10–20 years

5–10 years

5–15 years

10–15 years
8.
Choose the best answer.

The ____________ cycle is used by a virus to destroy the host cell to reproduce the virus.

lysogenic

helical

lytic

binal
9.
Choose the best answer.

Why is targeting T-helper cells so damaging to humans? The fewer of these helper cells there are, the less ability the ___________ system has to fight off infection.

skeletal

immune

muscular

nervous
10.
Choose the best answer.

All viruses reproduce with the __________ cycle.

enveloped

lysogenic

cold

lytic
11.
Matching.

A retrovirus is a virus where the
gets copied into
inside the host cell.
12.
Choose the best answer.

Which of the following is NOT a way to pass the HIV virus from person to person?

by sharing glasses, forks, spoons, or other utensils

breast milk

by semen

by blood
13.
Fill in the blank.

A lipid membrane surrounding the protein coat is not found in all viruses. Those that have the lipid membrane are called

viruses. Those that don't have the membrane are called

viruses.
14.
Choose the best answer.

A(n) _______ is a weakened or dead version of an infectious agent such as a virus, resulting in a person's body forming antibodies that destroy the infectious agent when they encounter it, thereby bestowing immunity upon the person.

cold

immunity

vaccine

AIDS
15.
Choose the best answer.

Every virus is made up of these two things: ___________.

protein coat and nucleic acid

protein coat and RNA

lipid membrane and nucleic acid

lipid membrane and RNA
16.
Choose the best answer.

HIV targets the body's ____________ system.

nervous

skeletal

muscular

immune
17.
Choose the best answer.

AIDS (the disease caused by HIV) is responsible for killing _______________ people since 1981.

50 million

30 million

40 million

10 million

Answer 1

1. HIV
2. virus
3. True
4. reproduce; live
5. lysogenic
6. 200,000
7. 10–15 years
8. lytic
9. immune
10. lytic
11. RNA gets copied into DNA
12. by sharing glasses, forks, spoons, or other utensils
13. enveloped; nonenveloped (naked)
14. vaccine
15. protein coat and nucleic acid
16. immune
17. 30 million