Viruses

What is a host?

• Organism that lives on the cell and causes it harm 

• Something that causes harm to the cell 

• Cell that the virus invades and takes over

What is the first step of the virus reproduction cycle?

• The viruses genetic material (DNA) starts to take over the functions of the cell

• The host cell bursts open, releasing the new viruses

• The virus injects its genetic material into the cell

• A virus attaches to the surface of a host cell

What is the last step in the viral reproduction cycle?

• A virus attaches to the surface of a host cell

• The proteins and genetic material start to assemble in the cell

• The host cell bursts open, releasing the new viruses

• The virus injects its genetic material into the cell

Which is bigger, a bacteria or a virus?

• Bacteria

• Virus

Which of the following helps prevent the spread of infectious diseases?

• Surgery

• Medication

• Vaccines

A(n) _____ is a virus that enters a bacterial cell.

• endospore

• decomposer

• plasmid

• bacteriophage

When a virus invades a living cell, its _______
takes over the cell's functions.

• outer coat

• genetic material

• core

• cytoplasm

Tags

NGSS.MS-LS1-2

Which viral life cycle kills its host cell by lysing?

• lytic

• mitosis

• lysogenic

• S phase

Which viral life cycle allows viral genetic material to lay dormant while the host cell reproduces?

• lytic

• mitosis

• lysogenic

• S phase

Viruses have structures that allow them to inject their genetic material directly into the DNA of the host cell. This strategy benefits the virus in that –

• the host cell is turned into a virus.

• mutations are introduced into the host cell.

• it is able to transform into a host cell.

• the virus uses the host’s machinery to replicate.

Tags

NGSS.MS-LS3-1