Viruses Flashcards Preview

Science > Viruses > Flashcards

Flashcards in Viruses Deck (35):
1

Many viruses cause what?

Diseases

2

Name some viruses

Common cold, flu, and acquired immune deficiency syndrome (AIDS)

3

Are viruses big or small?

Small

4

Are they bigger or smaller than bacteria?

Smaller

5

How many virus particles can fit in a drop of blood?

5 billion

6

Do viruses change?

Yes

7

If viruses change than does their affect on living things change?

Yes

8

Do viruses change often

Yes very often

9

Like living things, viruses contain (blank) and (blank)

Like living things, viruses contain protein and genetic material

10

Can viruses eat, grow, break down food, and use oxygen?

No

11

Can a virus function on its own?

No

12

Where is the only place a virus can reproduce?

A host

13

Host

An organism from which a parasite takes food or shelter

14

How does the virus reproduce using the host?

The virus forces the body to make more viruses

15

What are the basic shapes of viruses?

Crystals, spheres, cylinders, and spacecraft

16

How are viruses grouped?

By their shape, the disease they cause, their life cycle, or the genetic material they contain

17

Every virus is made up of (blank) inside a (blank)

Every virus is made up of genetic material inside a protein coat

18

The protein coat protects the (blank)

The protein coat protects the genetic material

19

The protein coat helps the virus enter a what?

A host cell

20

Many viruses have a protein coat that matches (blank) to their specific host

Characteristics

21

The genetic material in viruses is either (blank) or (blank)

DNA or RNA

22

Most RNA is made up of (blank) strand of nucleotides

One

23

Most DNA is made up of (blank) strand of nucleotides

Two

24

RNA and DNA both contain info for making (blank)

Proteins

25

The viruses that cause warts and chicken pox contain (blank)

DNA

26

Viruses that cause colds and the flu contain (blank)

RNA

27

The virus that causes AIDS which is called HIV also contains (blank)

RNA

28

Name step 1 in the lytic cycle

The virus finds and joins itself to a host cell

29

Name step 2 in the lytic cycle

The virus enters the cell or the virus's genetic material is injected into the cell

30

Name step 3 in the lytic cycle

Once the virus's genes are inside, they take over the direction of the host cell and turn it into a virus factory

31

Name step 4 in the lytic cycle

The viruses break out of the host cell, which kills the host cell. The cycle begins again

32

Do all viruses go straight into the lytic cycle?

No

33

Do the viruses that don't go straight into the lytic cycle take shorter or longer time than the ones that do?

Longer

34

Do antibiotics kill viruses?

No they just prevent them

35

Virus

A microscopic particle that gets inside a cell and often destroys the cell