Biology Virus life Cycle

Question 1

What does MRS GREN stand for?

Answer 1

Movement
Respiration
Sensitivity

Growth
Reproduction
Exercise
Nutrition

Question 2

Name All the steps in the lytic Cycle.

Answer 2

1. Virus attaches to the host cell
2. Virus releases its DNA into the host cell
3. The host’s DNA breaks down
4. The virus uses the processes in the cell to produce protein, lipids , carbohydrates and DNA (all the parts needed to make a new virus)
5. The new viruses are assembles , break the cell destroying it and leaves to go to infect other cells.

Question 3

Name All the steps in the lysogenic Cycle.

Answer 3

1. Virus attaches to the host cell
2. Virus releases its DNA into the host cell
3. The DNA gets incorporated into the DNA o f the host cell
4. The virus remains dormant
5. As the cell multiplies to form new cells , the new cells also contain the DNA of the
   virus
6. Once something triggers the virus , its DNA becomes active and enters the lytic
   cycle

Question 3

What are the 4 pieces of structure?

Answer 3

Contain DNA or RNA
May have an outer lipid envelope
Have a protein coat or capsid made up of repeating capsomeres
some contain the enzyme reverse transcriptase