Virus 4C Unit test

Cells differ from viruses in that only cells -

• use genetic material.

• are microscopic structures.

• contain cytoplasm.

• have protective covering.

In what way is the lysogenic cycle different from the lytic cycle?

• The virus recognizes and attaches to host cell.

• The host cell is not destroyed immediately.

• Viral DNA is replicated along with host DNA.

• The virus injects its DNA into the host cell.

A bacteriophage can't cause disease in humans because it -

• does not have the correct surface proteins.

• can only use bacterial DNA to replicate.

• gets destroyed in the human digestive tract.

• is able to reproduce without a host cell.

The viral structure responsible for recognizing specific host cells is -

• a surface protein.

• genetic material.

• a retrovirus.

• a bacteriophage.

A bacteriophage virus causes infection in bacteria by injecting which of the following?

• DNA

• Hormones

• Proteins

• Lipids

A viral infection can lead to cancer by all of the following methods EXCEPT

• altering the host cell DNA.

• disrupting the host cell cycle.

• damaging the immune system.

• releasing viruses, infecting other cells.

Which of the following characteristics is shared by viruses and living cells? Both viruses and living cells -

• have a nucleus, as well as a cell wall.

• contain nucleic acids such as DNA or RNA.

• can replicate independently of a host cell.

• use organelles to perform life functions.

A bacteriophage virus causes infection in bacteria by injecting which of the following?

• DNA

• Hormones

• Proteins

• Lipids

Which of the following characteristics is shared by viruses and living cells? Both viruses and living cells –

• have a nucleus, as well as a cell wall.

• contain nucleic acids such as DNA or RNA.

• can replicate independently of a host cell.

• use organelles to perform life functions.

in the Lytic cycle, the first step of a viral infection is to ​ (a)   , the second step is to then​ (b)   ​ .The third step will then be to ​ ​ (c)   the fourth step will be to ​ (d)   The fifth and final step is to ​ (e)  

• Land on the surface proteins
• inject its genetic material
• swim to nucleus, begin production of viral DNA
• produce copies of virus at rapid rate
• lyse the cell, have virus swim to other cells
• penetrate cell
• produce copies of virus at slow rate
• swim to mitochondria, Producing DNA
• Inject every part of virus
• cause cell to feed on other cells