LESSON 3: D3 -Viruses

Question 1

What is a virus

Answer 1

A small non-living particle

Question 2

Are viruses cells?

Answer 2

No

• They cannot grow, reproduce and do not have otganelles

Question 3

Viruses are a simple…

Answer 3

Packages of gentic instruction in the form of DNA or RNA

Question 4

Are viruses still classifed with taxonomic classifications?

Answer 4

Yes

Question 5

Do anti-biotics work agasint viruses?

Answer 5

No

Question 6

What is the protien coat all viruses have?

Answer 6

Capsid

Question 7

What is needed for a virus to grow?

Answer 7

A host

Question 8

What are the two cycyles of virus replication?

Answer 8

Lytic and Lysogenic

Question 9

What are the four stages of the lytic cycle?

Answer 9

Attachment, Synthesis, Assembily, Release

Question 10

What is the attachment stage within the lytic cycle?

Answer 10

• Virus attaches itself to host cells receptos on the surface

-either the whole virus is taken into the cell or DNA/RNA is injected into the cell

Question 11

What is the synthesis stage within the lytic cycle?

Answer 11

• DNA/RNA instruct the cell to produce new virus parts

Question 12

What is the assembily stage within the lytic cycle?

Answer 12

• New virus parts are brought together and assemble new viruses

Question 13

What is the release stage within the lytic cycle?

Answer 13

• New viruses are relased from the cell (lysing) and the host cell is killed

Question 14

Does RNA go into lytic or lysogentic cycle?

Answer 14

Lytic

Question 15

Viruses that are DNA go into….

Answer 15

Lysogentic cycle

Question 16

Is it possible for DNA in the lysogentic cycle to be tirgged into the lytic cycle?

Answer 16

Yes! This can be due to a chemical reaction or a stressor

Question 17

How is the lysogentic cyle different from the lytic cycle?

Answer 17

The virus is dormat

Question 18

What are the steps in the lysogentic cycle?

Answer 18

• DNA/RNA are injected, however; host cell is not controlled

-The vrila DNA becomes apart of the cells DNA

• Cell is replicated with the viruses gentic code

-New daughter cells created

• Host cell is not killed via lysogentic cycle

Question 19

What is rhinovirus?

Answer 19

• The common cold
• Smallest vrius

Question 20

What is influenza

Answer 20

• The flu
• Anti-flu m,edicnes can help wuith the flu before it enters the body

Question 21

What is HPV

Answer 21

• HPV is a DNA virus
• There is a vaccine for it
• HPV16 and HPV18 can cause cervical cancer

Question 22

What is ebola?

Answer 22

• Viral fever
  -Affects humans and primates
• not easily spread
  -Many cells are killed which triggers immune system overload, damges blood cells causing internal and external bleeding
• no vaccine
• occurs in poorer countries

Question 23

What is HIV?

Answer 23

• Viral infection
• HIV can lead to AIDS
• HIV leads to organ failure
  -Medication needed in order to live a long life
  -HIV infects HelperT cells (they are the front line defensive of our immune system)

Question 24

What is smallpox

Answer 24

• Infectious disease
  -virus attacks blood vessels on skin and mouth causing blisters
• there is a vaccine

Question 25

What is COVID?

Answer 25

-Viral infection thaqt danges mupltile bodily systems -very contagious - Virus has spike protiens to allow it to move quicker in the body

Question 26

How can viral infections be treated with antiviral medicne by follow which set of rules?

Answer 26

- Entry - Nucleic acid replication -Virus protien processing -Virus maturation

Question 27

How can viral infections be treated?

Answer 27

Vaccines

Question 28

What are the three types of Vaccines?

Answer 28

- Live attenuated agents - Inactivated whole agents - Subunit preperations

Question 29

Explain Live attenuated agents vaccines

Answer 29

- weak or modified versions so they are less harmful

Question 30

Explain Inactivated whole agents vaccines

Answer 30

- modifed viruses so that cannot trigger diseases

Question 31

Explain Subunit preperations vaccines

Answer 31

- Only part of the agent is used to provoake and immune response

Question 32

How do vaccines work?

Answer 32

- your immune system specifically your white blood cells remember the virus - prepares your immune system for acutal contatc with the virus