Virus

Most scientists classify viruses as "​ (a)   " because they lack the ability to ​ (b)   alone and perform ​ (c)  

processes on their own.

• nonliving

• reproduce

• metabolic

• living

• host

• energy

Answer explanation

Most scientists classify viruses as 'nonliving' because they lack the ability to 'reproduce' alone and perform 'metabolic' processes on their own, distinguishing them from living organisms.

TRUE or FALSE -

Viruses are smaller than the hosts they infect?

• TRUE

• FALSE

Answer explanation

Because they can't reproduce by themselves (without a host), viruses are not considered living. Nor do viruses have cells: they're very small, much smaller than the cells of living things, and are basically just packages of nucleic acid and protein.

To what would the phrase "is not a cell but has the ability to reproduce within a living cell" best describe?

• an alga

• a yeast

• a bacterium

• a virus

Viruses are considered nonliving because they need a host to reproduce.

• True

• False

Which of the following pictures is NOT a example of a virus?

• a

• b

• c

• d

Which of the following best describes an active virus?

• It remains dormant in the host cell.

• It immediately begins to replicate after entering the host cell.

• It integrates its DNA into the host's genome.

• It does not cause any symptoms in the host.

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

• store genetic information

• have chloroplasts

• use glucose for cellular respiration

• have endoplasmic reticulum

Viruses are...

• prokaryotic

• eukaryotic

• non-living

• endospores

What characteristic do viruses have in common with living cells?

• store genetic information

• have chloroplasts

• use glucose for cellular respiration

• have endoplasmic reticulum

(click all that apply) What are shapes of viruses that we have talked about

• Helical

• Polyhedral

• Enveloped

• bacteriophage

• Capisd