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Biology > Viruses > Flashcards

Viruses Flashcards

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1
Q

What kingdom does viruses fall under

A

Trick question- it is currently not classified

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2
Q

What is a viruses only characteristic of life ?

A

Reproduction

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3
Q

Is a virus multicellular, unicellular or acellular ?

A

Acellular

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4
Q

Is a virus prokaryotic or eukaryotic ?

A

Neither

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5
Q

Small/ simple composition or large and complex composition?

A

Small and simple composition

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6
Q

How are viruses differentiated ?

A

By shape

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7
Q

What type of nucleic acid is present in viruses. ?

A

DNA or RNA

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8
Q

Describe the structure of a pathogenic virus ( that enables protection)

A

Pathogenic virus contains sheath/ envelope of lipid - reason? To protect it from digestive enzymes

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9
Q

What can a pathogenic virus infect?

A

Plans , animals or bacterial cells

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10
Q

What do we call viruses that infect bacterial cells ?

A

Bacteriophage

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11
Q

What are the three structural things absent in viruses ?

A

No nucleus , cytoplasm or organelles

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12
Q

What do we call viruses that only reproduce inside living cells ?

A

Obligate intracellular parasites

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13
Q

The term “virus” is used when the organism is _____

A

Active

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14
Q

The term “virion” is used when the organism is ___

A

Dormant , no contact with a host cell

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15
Q

The term “ viroid” is used when the organism ____

A

Causes diseases in plants

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16
Q

Retrovirus ? DNA or RNA ?

A

Virus with RNA

17
Q

What are the five stages of reproduction ( virus)

A
  • absorption
  • penetration
  • latent phase
  • latent phase
  • lysis
18
Q

What does the absorption phase in the reproduction of bacteriophage exclude ?

A

Bacteriophage ( virus) approaches bacteria ( host) , attaches to receptor on cell membrane

19
Q

Penetration phase in v.reproduction ?

A

Bacteriophage ( virus) engulfed by endocytosis , then it releases its nucleic acid , injected into host , only left with empty capsid

20
Q

First latent phase. ?

A

New virus nucleic acid is formed

21
Q

Second latent phase

A

A new bacteriophage w/t protein shield formed

22
Q

Lysis phase?

A 
Lysis ( breakdown) 
Bacteria cell bursts and new bacteriophage( virus) is released , host = destroyed
23
Q

Quick summery one sentence on how a virus reproduces ?

A

Reproduced by converting genetic material of host into viral nucleic acid , new virus produced

Biology (8 decks)

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