Biology U1 L1 - Viruses

Front 1

Why is a virus considered to be nonliving?

Back 1

A virus doesn't breathe, grow, or develop.

Front 2

How do retroviruses convert their RNA to DNA?

Back 2

Viruses use the enzyme "reverse transcriptase" to turn viral RNA into DNA.

Front 3

In this cycle, the virus's DNA combines with the host cells chromosomes, without killing the host.

Back 3

lysogenic cycle

Front 4

virus-like particle, made of only a strand of RNA

Back 4

viroid

Front 5

virus-like particle, made of only protein; has no genetic material

Back 5

prion

Front 6

viral DNA that has combined with the host cell's chromosome and is replicated each time the host cell replicates.

Back 6

provirus

Front 7

living cell in which a virus replicates

Back 7

host cell

Front 8

enzyme carried with a retrovirus that helps make viral DNA from RNA

Back 8

reverse transcriptase

Front 9

What is the difference between a lytic cycle and a lysogenic cycle?

Back 9

In the short lytic cycle, the virus immediately replicates and kills the host cell. In the longer, lysogenic cycle, the virus DNA replicates slowly, along with the host's DNA, without killing it.

Front 10

Describe the state of a herpes virus in a person who had cold sores several years ago

Back 10

The virus may be in a lysogenic cycle. When the virus goes into a lytic cycle someday the person will get another cold sore.

Front 11

The outer coat of a virus, made of proteins

Back 11

capsid

Front 12

a nonliving particle made of an inner core of nucleic acid surrounded by a capsid

Back 12

virus

Front 13

a virus that contains RNA; it uses reverse transcriptase to turn the RNA into DNA.

Back 13

retrovirus

Front 14

viruses that infect and destroy bacteria

Back 14

bacteriophages

Front 15

In this cycle, the virus immediately takes over the host cell's metabolism and uses it to make new viruses until the cell bursts and dies

Back 15

lytic cycle