1. 6.4 How Viruses Reproduce
By Jun Hyuk Oh, Gaeun Lee

2. ACTIVE VIRUS
What is active virus
An "active virus" is when a virus enters a cell and is active, it causes the host cell to make new viruses.

3. A virus attaches to the surface of a bacterium
The virus injects its genetic material into the bacterium

4. The virus’s genetic material takes over the cell functions of the bacterium. The cell starts to produce the virus’s proteins and genetic material
The proteins and genetic material assemble into new viruses that fill the bacterium
The bacterium bursts open, releasing new viruses. The viruses can go onto infect more cells.

5. Hidden Virus
Active viruses enter cells and immediately begin to multiply, leading to the quick death of the invaded cells. Other viruses “hide” for a while inside the host cells before they become active. They are “Hidden Virus”

6. A virus attaches to the surface of a bacterium.
The virus injects its genetic material into the bacterium
The virus’s genetic material becomes a part of the genetic material of the bacterium

7. After time, the virus’s genetic material removes itself and becomes active
The cell begins to produce the virus’s proteins and genetic material, which assemble into new viruses
The new viruses crowd the bacterium. Finally, the cell bursts open and releases the new viruses

8. Thank you for watching!