cells, viruses, bacteria

Question 1

bacteriophages

Answer 1

viruses that infect bacteria
considered to be a productive infection when production of new virions occurs
may have a lytic or lysogenic cycle

Question 2

lytic cycle

Answer 2

occurs in some bacteriophages
1. phage infects a cell
2. phage DNA circularizes and remains separate from host DNA
3. phage DNA replicates and new phage particles are assembled
4. the cell lyses, releasing phages

Question 3

lysogenic cycle

Answer 3

occurs in some bacteriophages
1. phage infects a cell
2. phage DNA becomes incorporated into the host DNA
3. cell divides, and prophage DNA is passed onto daughter cells
4. under stressful conditions (starvation or exposure to toxic chemicals), phage DNA is excised from the bacterial chromosome and enters the lytic cycle
5. phage DNA replicates and new phage particles are assembled
6. the cell lyses, releasing phages

Question 4

latency period

Answer 4

viruses that infect plant or animal cells cells may undergo periods where they are not producing virions for long periods of time
viruses may leave latency periodically to cause lesions in skin where virus replicates
(AKA quiescence)