Virus Intro + Structure

Virus Intro + Structure

Learning Goals

• What is a virus?

• How do viruses infect living organisms?

• What happens after a virus infects a cell?

• Why are viruses considered nonliving things?

VIRUSES AND CELLS

Poll

Do you think viruses are a type of cell?

• Yes

• No

Multiple Select

Which 4 things are viruses not able to do?

• Grow + Develop

• Obtain + Use Energy

• Respond to Environment

• Mutate + Evolve

• Reproduce on their own

Multiple Choice

Are viruses classified as living things?

• Yes

• No

Multiple Choice

What do viruses have to do in order to replicate (make copies)?

• cell division

• infect a host cell

• mitosis

• binary fission

• clone itself

Multiple Choice

If a virus can't infect a host cell, then it can't replicate (make copies) - meaning it won't survive

• True

• False

Multiple Select

Which types of organisms can be infected by viruses?

• Animals

• Plants

• Bacteria

• Fungi

Multiple Choice

Are viruses very specific to the type of cells they can infect?

Ex: plant viruses can infect plants, but not animals

• Yes

• No

VIRUS STRUCTURE

AND COMPOSITION

Multiple Choice

All viruses will have either DNA or RNA as their genetic material.

• True

• False

Multiple Choice

Which virus structure surrounds and protects the genetic material (DNA or RNA)?

• envelope

• sheath

• capsid

• cell membrane

Multiple Choice

Which virus structure is a lipid membrane that surrounds the protein coat? This is only found on some viruses - not all.

• envelope

• spike proteins

• capsid

• cell membrane

Multiple Select

Which 2 things do all viruses contain?

• Envelope (lipid membrane that surrounds the capsid)

• Genetic Material (DNA or RNA)

• Capsid (protein coat that surrounds genetic material)

• Nucleus (control center of the cell)

Multiple Select

Which statements are true when talking about viral envelopes?

• virus gets the envelope as it leaves a host cell

• viral envelope will have spike proteins on it

• having an envelope makes it easier to infect cells

• viruses with an envelope are "disguised" and may evade the immune system

Open Ended

Think about what you learned about viruses today and explain what viruses do in order to replicate and how they do it.