Viruses, Immune System, and Vaccines

Are viruses cells?

• Yes

• No

• Sometimes

• Maybe

Viruses are

• bigger than cells

• same size as cells

• smaller than cells

Which types of organisms have viruses that can infect them?

• Plants

• Animals

• Bacteria

• Fungi

Which four facts explain why viruses are considered non-living?

• viruses can't reproduce on own

• viruses have to infect host cell to replicate

• viruses can't grow / develop

• viruses can't obtain and use energy

• viruses can't mutate or evolve

Label the parts of a common virus

a

b

c

Capsid

Spike Proteins

DNA or RNA

Viruses can have either DNA or RNA as their genetic material.

• True

• False

The protein coat surrounding the viral genetic material (DNA or RNA) is called the

• envelope

• sheath

• capsid

• spike proteins

Viruses come in many different shapes, sizes, and variations.

• Maybe
• False
• True

Put the steps of a typical viral infection in the correct order

• Cell forced to make tons of virus copies

• Cell is hijacked, viral genetic material takes over cell

• Virus attaches to host cell

• Virus copies leave cell, often damaging cell in process

• Virus either enters cell or injects genetic material into cell

Which viral infection cycle involves the virus inserting its genetic material into the host cell's DNA, the DNA remains dormant for a while and getting copied each time the cell reproduces, and then all the viral genetic material becomes active at once and lots of viruses get made all at the same time?

• Lytic Cycle

• Lysogenic Cycle