VOCABULARY REVIEW Define the following terms

virus ________

capsid ________

retrovirus ________

lytic cycle ________

lysogenic cycle ________

Viruses are not alive because they

• a. do not grow.

• b. lack cell parts.

• c. do not metabolize.

• d. All of the above.

Viruses can reproduce

• a. independently of host cells.

• b. independently of host cells if they first take up organelles from the host cells.

• c. only within host cells.

• d. only with the assistance of other viruses.

The enzyme reverse transcriptase uses

• a. DNA as a template to make more DNA.

• b. DNA as a template to make RNA.

• c. RNA as a template to make more RNA.

• d. RNA as a template to make DNA.

The grouping of viruses is based partly on the

• a. presence or absence of an envelope.

• b. presence or absence of nucleic acid.

• c. type of organism they infect.

• d. structure of their organelles.

Phage DNA that is integrated into a host cell’s chromosome is a

• a. coronavirus.

• b. retrovirus.

• c. prophage.

• d. capsid.