Viruses

Viruses

The Life Cycle Of Viruses

Learning objectives

• BIOL.4C

• Compare the structure of viruses to cells

• describe viral reproduction

• describe the role of viruses in causing diseases, such as human immunodeficiency virus (HIV) and influenza.

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Multiple Choice

How could you describe the size of a virus?

• Smaller than bacteria

• About the size of a dime

• Larger than a parasite

• Smaller than a proton

Multiple Choice

What are viruses?

• Prokaryotes

• Eukaryotes

• Non-Living

• endospores

Multiple Choice

What part of the virus is number 1?

• Capsid

• Surface Markers

• DNA

• Envelope

Multiple Choice

What part of the virus is number 3?

• Surface Markers

• Envelope

• DNA

• Capsid

Multiple Choice

What do viruses have in common with living cells? They both.

• store genetic information

• use glucose for cellular respiration

• have chloroplasts

• have endoplasmic reticulum

Multiple Choice

The virus in the previous slide diagram is called a bacteria phage. It only infects

• Bacteria

• Animals

• Protista

• Plants

Multiple Select

You might say that Viruses are specifically ________ to invade their hosts

• evolved

• designed

Multiple Choice

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 virus injects its genetic material into the cell

• The host cell bursts open, releasing the new viruses

• A virus attaches to the surface of a host cell

Multiple Choice

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

• Lytic

• Lysogenic

• Mitosis

• S-phase

Multiple Choice

What part of a virus is the protein capsule that houses the genetic material (DNA/RNA)?

• Tail

• Capsid

• Nucleus

• Glycoprotein

Multiple Select

True or False

The flu is caused by a virus.

• True

• False

Multiple Choice

Which can be treated with antibiotics?

• Virus

• Mutagen

• Bacteria

• Parasite