5 Written Questions

1. a gene that induces cancer, or uncontrolled cell proliferation.
2. a virus that is not able to replicate in a host cell.
3. a gene that regulates normal cell division but that can become a cancer-causing oncogene as a result of mutation or recombination.
4. a method of viral replication in which a viral genome is replicated as a provirus without destroying the host cell.
5. the viral genome (DNA) of a vacteriophage that has entered a bacterial cell, has become attached to the bacterial chromosone, and is replicated with the host bacterium's DNA.

5 Matching Questions

1. vector
2. emerging disease
3. reverse transcriptase
4. prion
5. lytic cycle

1. a a method of viral replication that results in the destruction of a host cell and the release of many new virus particles.
2. b an infectious particle that consists only of a protein and that does not contain DNA or RNA.
3. c a disease that is caused by new or reappearing infectionious agents that typically exist in animal populations.
4. d in biology, any agent, such as a plasmid or a virus, that can incorporate foreign DNA and transfer that DNA from one organism to another; an intermediate host that transfers a pathogen or a parasite to another organism.
5. e an enzyme that catalyzes the formation of DNA from an RNA template.

5 Multiple Choice Questions

1. a nonliving, infectious particle composed of a nucleic acid and a protein coat; if can invade and destroy a cell.
   1. virulent
   2. virus
   3. provirus
   4. viroid
2. a membranelike layer that convers the capsids of some viruses.
   1. oncogene
   2. envelope
   3. viroid
   4. vector
3. a virus that contains single stranded RNA and produces a reverse transcriptase, which converts RNA to DNA.
   1. retrovirus
   2. provirus
   3. virus
   4. vector
4. a protein sheath that surrounds the nucleic acid core in a virus.
   1. lysis
   2. capsid
   3. viroid
   4. prion
5. descrives a microorganism that causes desease and that is highly infectious; strictly, refers only to viruses that reproduce by the lytic cycle.
   1. viroid
   2. virulent
   3. virus
   4. oncogene

5 True/False Questions

1. protease inhibiter → a type of drug that blocks the synthesis of new viral capsid that is used to treat diseases such as AIDS.

   True        False

2. temperate virus → a weakened form of a virus that cannot cause disease.

   True        False

3. provirus → a virus that contains single stranded RNA and produces a reverse transcriptase, which converts RNA to DNA.

   True        False

4. bacteriophage → a virus that infects bacteria.

   True        False

5. viroid → an infectious agent that is made up of a short, circular, single strand of RNA that does not have a capsid; the smallest known particle that is able to replicate.

   True        False