Virus Replication Review

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.

Cells differ from viruses in that only cells -

• use genetic material.

• are microscopic structures.

• contain cytoplasm.

• have protective covering.

Tags

NGSS.MS-LS1-1

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

• DNA

• Hormones

• Proteins

• Lipids

Tags

NGSS.MS-LS3-1

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

What does a host cell provide for a virus?

• A source of thermal energy

• Protection from the environment.

• Mechanisms for genetic replication.

• Large molecules as a food source.

match all of the following to what a virus can do

f

h

a

d

they do not breathe

they breathe

they do not reproduce

they grow

they metabolize

they reproduce

they do not metabolize

they do not grow

All of the following are steps in the process of viral replication EXCEPT –

• the virus incorporates its genetic material into host DNA.

• the virus uses host cell to assemble more virus particles.

• the host cell replicates viral genetic material with its own.

• the host cell generates antibodies to a viral infestation.

A virus that causes intestinal dysfunction cannot attack respiratory cells because -

• it has no method to enter the respiratory system.

• the respiratory tract is protected by a mucus membrane.

• proteins on the virus do not recognize the respiratory cell.

• respiratory cells are equipped to destroy all entering viruses.