Pharmaceutical Microbiology

In the (a)   cycle , the viral DNA inserts, or integrates, into a chromosome in a host cell.

Which is not a step in retorviral replication?

• Reverse transcriptase synthesizes DNA using the viral RNA as a template.

• When the virus attaches to a cell, the virus moves into the cytoplasm of the host cell and the viral RNA is released.

• The viral genes instruct the host cell to make more viral protein capsids and enzymes needed for viral replication.

• The DNA moves into the nucleus of the host cell and integrates into a chromosome.

Viruses consist of a _____ , an outer layer made of proteins, and _______ material, which could be DNA or RNA.

(a)  

A virus that has RNA instead of DNA for its genetic material is called a (a)   and it has a complex replication cycle.

In the ______ _______ the host cell makes many copies of the viral RNA or DNA.

(a)  

Which is the outer layer of all viruses that is made of proteins?

• cell membrane

• Genetic material

• Tail fiber

• Capsid

Which statements about the origin of viruses are true?

Select all that apply

• One theory, now considered to be most likely, is that viruses came from parts of cells.

• Scientists have found that the genetic material of viruses is similar to cellular genes.

• originated from bacteria

During which cycle does the viral DNA insert into a chromosome in a host cell?

• Lytic

• Replication

• Lysogenic

• Infection

During which cycle does the host cell make many copies of the viral RNA or DNA?

• Infection

• Lysogenic

• Replication

• Lytic

During which cycle does the host cell make many copies of the viral RNA or DNA?

• Infection

• Lysogenic

• Replication

• Lytic