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Study sets matching "properties viruses"

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Study sets matching "properties viruses"

14 terms
Properties of viruses
viruses contain a single type of nucle…
viruses are surrounded by
Helical
Polyhedral
DNA or RNA... can be DS=double stranded... or SS= single stranded
a capsid:... its a protein coat made up of smaller units called…
tightly coiled surrounded by en envelope
multiple sides... ex: head of a bacteriophage
viruses contain a single type of nucle…
DNA or RNA... can be DS=double stranded... or SS= single stranded
viruses are surrounded by
a capsid:... its a protein coat made up of smaller units called…
14 terms
Properties of viruses
T or F: virus must shed it's protein c…
time from first absorption of virus un…
time from first absorptionof virus unt…
most RNA viruses replicate in the
True
eclipse period
latent period
cytoplasm
T or F: virus must shed it's protein c…
True
time from first absorption of virus un…
eclipse period
69 terms
Properties of Viruses - Lec 1
bacteriophage
3 charac of viruses
antivirals
virus size
viruses that infect bacteria
1) highly transmissible, 2) most virus diseases are acute and…
amantadine, for example
100-1000x smaller than cells, approx 10microm in diameter
bacteriophage
viruses that infect bacteria
3 charac of viruses
1) highly transmissible, 2) most virus diseases are acute and…
61 terms
Properties + Pathogenesis of Viruses
_____ are viruses that can infect bact…
Viruses cause about ___% of human canc…
Most viruses are <= ___ nm in diameter.
What kind of genomes do viruses possess?
Bacteriophages
20%
100
RNA or DNA
_____ are viruses that can infect bact…
Bacteriophages
Viruses cause about ___% of human canc…
20%
27 terms
Viruses: properties and structure
Viruses...... (fist major property)
Viruses...... (second major property)
Viruses...... (third major property)
Viruses...... (fourth major property)
very small, most are <0.3 um. There is a variation though (pi…
are obligate intracellular parasites.... No growth or reproducti…
Infect all forms of life- bacteria, fungi, protest, animals,…
Largely just protein shells that contain a genome- designed f…
Viruses...... (fist major property)
very small, most are <0.3 um. There is a variation though (pi…
Viruses...... (second major property)
are obligate intracellular parasites.... No growth or reproducti…
10 terms
Properties and Structure of Viruses
Simple, acellular organization, consis…
Viruses are enclosed in a coat of ____…
Viruses are obligate intracellular ___…
Vision size is considered ________ bec…
DNA, RNA
Protein
parasites
Ultramicroscopic
Simple, acellular organization, consis…
DNA, RNA
Viruses are enclosed in a coat of ____…
Protein
9 terms
Viruses: structure and properties
Approximate size of a virus
Mode of replication of viruses
Symmetry of viruses
Helical structure
10-300nm
Only inside living cells... Redirect host cells' protein synthes…
1)Cubic-icosahedral protein shell... 2)Helical... 3)Complex (non-cu…
Virus has an elongated nucleocapsid and enclosed nucleic acid…
Approximate size of a virus
10-300nm
Mode of replication of viruses
Only inside living cells... Redirect host cells' protein synthes…
27 terms
Structure and Properties of Viruses
viruses are only visible under a __
how do you cultivate viruses?
what enzymes do viruses have for energ…
almost all viruses contain either __ o…
electron microscope
living host cells
none
DNA, RNA, CMV
viruses are only visible under a __
electron microscope
how do you cultivate viruses?
living host cells
24 terms
9.) Properties of Viruses
What are the important differences of…
What is the mimivirus/mamavirus/megavi…
Define Virus
What commonly known virus has a segmen…
1.) Size: Viruses are typically much smaller (<300nm) and bac…
This was a virus that was isolated from an amoeba much larger…
Virus: Consists of a genome of either DNA or RNA that is surr…
Flu virus. Has 8 segments. One codes for HA (hemaglutanin), o…
What are the important differences of…
1.) Size: Viruses are typically much smaller (<300nm) and bac…
What is the mimivirus/mamavirus/megavi…
This was a virus that was isolated from an amoeba much larger…
22 terms
[005] Viruses: structure and properties
Meaning of Koch's postulates
Koch's postulates
What does the indirect demonstration o…
Indirect demonstration of viruses proc…
Postulates should be fulfilled to prove an agent causes disease
1. Found in lesions of unhealthy organism but not found in he…
Concludes viruses are smaller than bacteria
1. Grind infected tissue into fluid suspension... 2. Pass suspen…
Meaning of Koch's postulates
Postulates should be fulfilled to prove an agent causes disease
Koch's postulates
1. Found in lesions of unhealthy organism but not found in he…
29 terms
Lecture #19 General Properties of Viruses
not all viruses have what?
what is the envelope of a virus made of?
what do all viruses have? what is its…
capsid + nucleic acid=?
an envelope
a phospholipid bilayer
a capsid... encloses and protects the nucleic acid
nucleocapsid
not all viruses have what?
an envelope
what is the envelope of a virus made of?
a phospholipid bilayer
12 terms
Properties of Viruses exam 4 microbiology
Intracellular parasite
Host specific: Single host
Host specific broad range:
size of viruses
Must live inside host cell for viral reproduction, cannot liv…
Polio: human nerve cell... Chicken pox: skin/nerve cells
Rabies: wildlife, dogs... human: muscle nerve (rabies attack hum…
smaller than a bacteria ... size range 500nm--->10nm.... Too small…
Intracellular parasite
Must live inside host cell for viral reproduction, cannot liv…
Host specific: Single host
Polio: human nerve cell... Chicken pox: skin/nerve cells
6 terms
Properties of Different bacteria, viruses, and microorganisms.
Staphylococci
Staphylococcus aureus
Streptococci
Streptococcus pyogenes
Spherical gram-positive bacteria
Spherical gram-positive bacteria
Spherical gram-positive bacteria. (grow in chains)
Spherical gram-positive bacteria. (grow in chains)
Staphylococci
Spherical gram-positive bacteria
Staphylococcus aureus
Spherical gram-positive bacteria
48 terms
Lecture 1 Blewett Properties of Viruses
What were the 3 early observations abo…
What is the smallest virus we need to…
What is the largest virus we need to k…
What is the definition of a virus?
1. Transmissible... 2. Filterable (small in size)... 3. Parasitic a…
Parvoviridae
Poxviridae
A genome(RNA or DNA) surrounded by a protective coat
What were the 3 early observations abo…
1. Transmissible... 2. Filterable (small in size)... 3. Parasitic a…
What is the smallest virus we need to…
Parvoviridae
45 terms
L1 Biological and Physical Properties of Viruses
Filterable virus
1. Remove bacteria and fungi from solu…
1. Tobacco mosaic virus... 2. Foot and mo…
Light microscope
A virus that is small enough to flow through a filter system
Main goal of filtering a solution containing a virus
Two examples of filterable viruses
The largest viruses are barely visible in _____ _______
Filterable virus
A virus that is small enough to flow through a filter system
1. Remove bacteria and fungi from solu…
Main goal of filtering a solution containing a virus
L1 Biological and Physical Properties of Viruses
Filterable virus
1. Remove bacteria and fungi from solu…
1. Tobacco mosaic virus... 2. Foot and mo…
Light microscope
A virus that is small enough to flow through a filter system
Main goal of filtering a solution containing a virus
Two examples of filterable viruses
The largest viruses are barely visible in _____ _______
Filterable virus
A virus that is small enough to flow through a filter system
1. Remove bacteria and fungi from solu…
Main goal of filtering a solution containing a virus
155 terms
ID Lecture 1 - Structure & Properties of Viruses
What are viruses
What can DNA virus' genome be - 2+2
What can RNA virus' genome be - 2 +3
What do viruses often have surrounding…
Viruses are small non-living, infectious parasites that have…
- ssDNA or dsDNA... - linear or circular
- (+)sense, (-)sense... - dsRNA, segmented or ambisense
- Viruses often have a capsid shell
What are viruses
Viruses are small non-living, infectious parasites that have…
What can DNA virus' genome be - 2+2
- ssDNA or dsDNA... - linear or circular
33 terms
Properties of animals plants protoctists fungi viruses and bacteria
Plants
Animals
Plants
Plants
They store carbohydrates as starch or sucrose
They have no cell walls
Cells have cellulose cell wall
Multicellular organisms
Plants
They store carbohydrates as starch or sucrose
Animals
They have no cell walls
44 terms
MIM 24+25: General Properties and Replication of Viruses
Filterability of viruses
Cultivation of viruses
Size of viruses
What organelle do viruses lack
Yes
Living hosts
<300 nm
Ribosomes
Filterability of viruses
Yes
Cultivation of viruses
Living hosts
39 terms
MICR2208 - Lecture 11 - General Properties of Viruses
Virion
Capsid
Envelope
Extracellular phase
A complete virus particle consisting of:... DNA or RNA (nucleic…
The protein shell that encloses a viral genome. It may be rod…
A lipid membrane outer layer envelope containing virus-derive…
Virus biochemically inert cannot reproduce independently of l…
Virion
A complete virus particle consisting of:... DNA or RNA (nucleic…
Capsid
The protein shell that encloses a viral genome. It may be rod…
8 terms
General Properties of RNA and DNA viruses (chapter 10)
Picornaviridae
Retroviridae
Rhabdoviridae
Orthomyxoviridae
(+) Sense RNA, small, naked, polyhedral... enterovirus... Rhinoviru…
(+) Sense RNA, enveloped, 2 copies... reverse transcriptase
(-) Sense RNA, enveloped... helical
(-) Sense RNA, medium-sized, enveloped... genome is segmented in…
Picornaviridae
(+) Sense RNA, small, naked, polyhedral... enterovirus... Rhinoviru…
Retroviridae
(+) Sense RNA, enveloped, 2 copies... reverse transcriptase
14 terms
Lecture 12 and 13- General properties of viruses
What are viruses?
How were viruses discovered?
How do you culture viruses?
What are the 4 general morphological t…
...
(1884) Chamberland: Invented bacterial filters, autoclave. Vi…
...
1. helical... 2. Icosahedral... 3. enveloped... 4. Complex
What are viruses?
...
How were viruses discovered?
(1884) Chamberland: Invented bacterial filters, autoclave. Vi…
98 terms
Properties of Life, Compound Microscope, Characteristics of Cells, Bacteria, Viruses.
Biology
Life
Organism
Seven Properties of Life
The study of life.
The presence of all life properties at some point in an organ…
Any living thing.
1. Metabolism... 2. Homeostasis... 3. Reproduction... 4. Heredity... 5. E…
Biology
The study of life.
Life
The presence of all life properties at some point in an organ…
19 terms
Microbiology Lecture #4: Viruses, Pathogenic Properties, Antiviral Drugs
Corynebacterium diphtheria, clostridiu…
Adenoviridae
Poxviridae
Herpesviridae
exhibits phage conversion - host cell exhibits new properties
dsDNA, nonenveloped, causes common cold, acute respiratory in…
dsDNA, enveloped, poxviruses; smallpox, cowpox, skin lesions
dsDNA, enveloped... HHV-1 and HHV-2 simplexvirus
Corynebacterium diphtheria, clostridiu…
exhibits phage conversion - host cell exhibits new properties
Adenoviridae
dsDNA, nonenveloped, causes common cold, acute respiratory in…
15 terms
MICR2208 Introductory Microbiology L11 General Properties of Viruses
Composition of a virion (virus particle)
Extracellular phase of virus
Intracellular phase of virus
Differential centrifugation
1. One or more molecules of DNA or RNA enclosed in a protein…
Biochemically inert, cannot reproduce independently of cells.
Exist as replicating nucleic acids, induct host cell to synth…
1. Mature infected cells disrupted. ... 2. Aqueous suspension of…
Composition of a virion (virus particle)
1. One or more molecules of DNA or RNA enclosed in a protein…
Extracellular phase of virus
Biochemically inert, cannot reproduce independently of cells.
59 terms
Microbiology (viruses, pathogenic properties and control, mechanisms, antiviral drugs)
What are some general characteristics…
What determines the host range of a vi…
What is a virion?
The nucleic acids of virions can be:
-obligatory intracellular parasite (need living host to repli…
- the receptors on the host cell that allow for ligand attach…
A completely developed infection viral particle (DNA or RNA p…
DNA or RNA (double stranded or single stranded)... linear or cir…
What are some general characteristics…
-obligatory intracellular parasite (need living host to repli…
What determines the host range of a vi…
- the receptors on the host cell that allow for ligand attach…
19 terms
Viruses
Metabolism
Nonliving properties of viruses
Living properties of viruses
How a virus transmits
The ability to collect and use energy
No homeostasis, no cells, and no metabolism
Reproduction, adaptation, and genetic material (only dna or r…
Airborne, food/drink, animals, humans
Metabolism
The ability to collect and use energy
Nonliving properties of viruses
No homeostasis, no cells, and no metabolism
51 terms
Viruses and Bacteria
What is a Virus?
Why dont viruses belong to any kingdom?
What is a retrovirus?
Why are retroviruses considered more d…
An infectious agent made up of nucleic acid (DNA OR RNA) wrap…
They have not nucleus, not organelles, no cytoplasm, or cell…
Viruses with RNA that transcribe into DNA
They force the cell to create viral DNA strands and those str…
What is a Virus?
An infectious agent made up of nucleic acid (DNA OR RNA) wrap…
Why dont viruses belong to any kingdom?
They have not nucleus, not organelles, no cytoplasm, or cell…
99 terms
Viruses
obligate intracellular parsites
virion
DNA is us vs Viruses
capsid
organism dependent on the biochemical machinery of the host c…
viral particle that includes nucleic acid genome packaged int…
us:ds DNA... viruses: dsDNA, ssDNA, dsRNA, ssRNA
protein coat of a virus
obligate intracellular parsites
organism dependent on the biochemical machinery of the host c…
virion
viral particle that includes nucleic acid genome packaged int…
30 terms
Viruses
viruses are made up of DNA or RNA wrap…
viruses can only reproduce within a
core of nucleic acid surrounded by pro…
ssDNA, dsDNA, dsRNA, ss(+)RNA, ss(-)RN…
protein coat
cell
virion
viral genomes
viruses are made up of DNA or RNA wrap…
protein coat
viruses can only reproduce within a
cell
23 terms
Viruses
Virus
Virion
Genome
Capsid
A-cellular (no nucleus)
virus in ECF/inactive virus
single of double stranded RNA or DNA
- protective coat that protects the genome... - aids virus attac…
Virus
A-cellular (no nucleus)
Virion
virus in ECF/inactive virus
37 terms
Viruses
viruses are made up of...
main properties... (2)
Size... (3)
Structure... (5)
genetic material and protein that can invade living cells
- lack a cell membrane... - Need a host to reproduce; mutate, ev…
- 0.01um to 0.3um... -most require use an electron microscope.
- composed of a core of nucleic acid... - In some viruses, the p…
viruses are made up of...
genetic material and protein that can invade living cells
main properties... (2)
- lack a cell membrane... - Need a host to reproduce; mutate, ev…
36 terms
Viruses
when are virions considered a virus?
Common properties of Viruses
Capsid
Envelopes
When they infect a cell
1 Genetic material is protected inside of a capsid ... 2. Recogn…
is a protein that covers viral genome- there are 3 types icos…
a phospholipid bilayer that surrounds the virus. A virus can…
when are virions considered a virus?
When they infect a cell
Common properties of Viruses
1 Genetic material is protected inside of a capsid ... 2. Recogn…
15 terms
Viruses
Virus
retrovirus
bacteriophage
Prokaryotic
A virus is a non-cellular particle made up of genetic materia…
Any of a group of RNA viruses that insert a DNA copy of their…
A virus that parasitizes a bacterium by infecting it and repr…
Cells that do not have a nucleus or membrane bound organelles.
Virus
A virus is a non-cellular particle made up of genetic materia…
retrovirus
Any of a group of RNA viruses that insert a DNA copy of their…
153 terms
Viruses
General Characteristics of Viruses:
Viruses are protected from much of the…
The genome is always surrounded by the…
How do the capsomers assemble into the…
-Obligate intracellular parasites of living cells ... -lack meta…
Cytomegalovirus (CMV) has been found to contain its DNA genom…
capsomers
spontaneously self assemble
General Characteristics of Viruses:
-Obligate intracellular parasites of living cells ... -lack meta…
Viruses are protected from much of the…
Cytomegalovirus (CMV) has been found to contain its DNA genom…
11 terms
Viruses & Virology
Define viruses
Unique properties of viruses
Composition of viral capsids
Shapes of viral capsids
Virus: A genetic element containing either RNA or DNA surroun…
Posess their own genome, but rely on cell for energy, metabol…
Capsid is composed of individual protein molecules called cap…
Viruses are symmetric. ... Rod-shaped viruses have helical sym…
Define viruses
Virus: A genetic element containing either RNA or DNA surroun…
Unique properties of viruses
Posess their own genome, but rely on cell for energy, metabol…
33 terms
Chapter 13 Viruses
DNA ENVELOPED Virus
Characteristics of Viruses
Host Range
Bacteriophages
Poxviridae... Herpesviridae... Hepadnaviridae
Obligatory intracellular parasites... Contain DNA or RNA... Contain…
The spectrum of host cells a virus can infect... Most viruses in…
viruses that infect bacteria... Range from 20 nm to 1000 nm in l…
DNA ENVELOPED Virus
Poxviridae... Herpesviridae... Hepadnaviridae
Characteristics of Viruses
Obligatory intracellular parasites... Contain DNA or RNA... Contain…
50 terms
Viruses
Basic Virus Properties
Virion polymerase Negative Sense
Replication of Positive Sense ssRNA Vi…
Virus replication is...
Acellular.... Obligate internal parasites.... Replication entirely…
Must be brought into the cell when translating negative sense…
1. Virus enters cell (typically endocytosis)... 2. RNA escapes c…
Dependent on host cell for provision of energy and chemical b…
Basic Virus Properties
Acellular.... Obligate internal parasites.... Replication entirely…
Virion polymerase Negative Sense
Must be brought into the cell when translating negative sense…
28 terms
Viruses
Properties of Viruses
Virus
Capsid
Nucleocapsid
-Obligate Intracellular parasites... -No energy (can't copy gene…
The smallest infectious agents (ranging from... about 20 nm to 3…
Protein coat that covers the genome; contains repeating subun…
Structure composed of the nucleic acid genome and the capsid…
Properties of Viruses
-Obligate Intracellular parasites... -No energy (can't copy gene…
Virus
The smallest infectious agents (ranging from... about 20 nm to 3…
43 terms
Viruses
Properties of viruses
Size
Pavoviruses size
mimiviruses
Infectious particles... Not alive... Need a host
smaller than bacteria, needs electron microscope
20nm wide
450nm long- some larger than small bacteria
Properties of viruses
Infectious particles... Not alive... Need a host
Size
smaller than bacteria, needs electron microscope
32 terms
viruses ch 6
virus
properties of virus
virus are composed of
capsid
are too small to be seen, need electron microscope. they can…
1. obligate intracellular parasites ... 2. are not cells... 3. need…
outside: capsid/envelope... central core: DNA or RNA
all virus have this, it surrounds the nucleic acid in the cen…
virus
are too small to be seen, need electron microscope. they can…
properties of virus
1. obligate intracellular parasites ... 2. are not cells... 3. need…
48 terms
Science Bacteria and Viruses
Interferon
Vaccines
Kingdom Monera ( no nucleus)
Pasteurization
A protection that interferes with the reproduction of viruses.
Protects a person from certain bacteria disease. Example:Poli…
Monerans are one-celled organisms, living in water, ice, soil…
Healing of a food to a temperature below boiling to kill bact…
Interferon
A protection that interferes with the reproduction of viruses.
Vaccines
Protects a person from certain bacteria disease. Example:Poli…
82 terms
Chapter 5: Viruses
Who does viruses infect
Pasteur
Ivanovski and Beijerinck
Loeffler and Frosch
every cell: bacteria, algae, fungi, protozoa, plants
developed first vaccine for rabies.
showed disease in tobacco was caused by a virus
used concept of filterable virus to show that something small…
Who does viruses infect
every cell: bacteria, algae, fungi, protozoa, plants
Pasteur
developed first vaccine for rabies.
68 terms
Ch. 6 (Viruses)
Who coined the word virus?
Who showed that the tobacco disease wa…
Who discovered the foot and mouth dise…
Describe the properties of viruses:
Pasteur
Ivanovski and M. Beijerinck
F. Loeffler and P. Frosch
• Obligate parasites of bacteria, protozoa, fungi, algae, pla…
Who coined the word virus?
Pasteur
Who showed that the tobacco disease wa…
Ivanovski and M. Beijerinck
14 terms
Viruses
Properties of Viruses
Properties of Viruses
Properties of Viruses
Properties of Viruses
are obligate intracellular parasites of bacteria, protozoa, f…
are ubiquitous in nature and have had major impact on develop…
are ultramicroscopic in size, ranging from 20nm up to 450nm (…
are not cells; structure is very compact and economical
Properties of Viruses
are obligate intracellular parasites of bacteria, protozoa, f…
Properties of Viruses
are ubiquitous in nature and have had major impact on develop…
13 terms
BIO 199: Viruses
Properties of life...
virus (latin for poison)
viral traits
virus examples
living creatures are organized, metabolize, use energy, respo…
small infectious agent that replicated only inside cells of o…
very small... need an electron microscope to view... acellular: n…
HIV virus causes AIDS... Herpes simplex virus causes warts... Inf…
Properties of life...
living creatures are organized, metabolize, use energy, respo…
virus (latin for poison)
small infectious agent that replicated only inside cells of o…
37 terms
Chapter 13- Viruses
Virus
General properties of Viruses
Classification- Host range
Classification- Size
An infectious agent having a simple acellular organization wi…
Obligate parasite,DNA or RNA ( never both)... Can exist extracel…
Based on types of cells a virus infects: ... animal,plant,eukary…
Variable size range: 25nm - 300 nm ( Bacteriophage 34nm)... Gene…
Virus
An infectious agent having a simple acellular organization wi…
General properties of Viruses
Obligate parasite,DNA or RNA ( never both)... Can exist extracel…
36 terms
Viruses and Bacteria
What is a Virus?
Why dont viruses belong to any kingdom?
What is a retrovirus?
Capsid
An infectious agent made up of nucleic acid (DNA OR RNA) wrap…
They have not nucleus, not organelles, no cytoplasm, or cell…
Viruses with RNA that transcribe into DNA
What is number 1 referring to?
What is a Virus?
An infectious agent made up of nucleic acid (DNA OR RNA) wrap…
Why dont viruses belong to any kingdom?
They have not nucleus, not organelles, no cytoplasm, or cell…
32 terms
EXAM 2 VIRUSES
bacteriophage
viruses
viruses composed of:
virion
virus that only infects bacteria
non-living "infectious agents" of disease; obligate intracell…
nucleic acid genome (DNA OR RNA; not both) ... protein coat ... lip…
virus particle not currently active (in cell=virus)
bacteriophage
virus that only infects bacteria
viruses
non-living "infectious agents" of disease; obligate intracell…
45 terms
11- Viruses
Compare Virus to Cell
What is a virion?
Properties of viruses
Compare genomes
virus: ... -subcellular, obligate intracellular PARASITE... - req…
complete infectious particle capable of causing infection aka…
Compare Virus to Cell
virus: ... -subcellular, obligate intracellular PARASITE... - req…
What is a virion?
complete infectious particle capable of causing infection aka…
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