Mic 205 Exam 3 UPDATED QUESTIONS
AND CORRECT ANSWERS
-minuscule, acellular infectious agents carrying DNA or RNA
-obligate intracellular parasites - CORRECT ANSWER viruses
F - CORRECT ANSWER T/F viruses have cytoplasmic membranes, cytosol, and organelles
Virons - CORRECT ANSWER when viruses are outside their host they are called what?
- possess a protein coat (capsid) that surrounds and protects the nucleic acid (viral genome) -
CORRECT ANSWER what is the structure of a virus?
-shed their protein capsids
-exist as naked nucleic acid - CORRECT ANSWER when inside their cellular hosts viruses do
what?
- genetic material
- capsid - CORRECT ANSWER what are required features of a virus?
- envelope
- appendages
- enzymes - CORRECT ANSWER what are optional features of a virus?
A phospholipid bilayer and proteins - CORRECT ANSWER the viral envelope is composed of
what?
Glycoprotein spikes - CORRECT ANSWER some viral proteins have ___________ that are
encoded by the viral genome
Viral replication - CORRECT ANSWER viral envelopes are acquired from host cell during?
,Narrow - CORRECT ANSWER do viruses have a broad or narrow host range?
- type of genetic material
- host range
- size and shape of virus
- structure of capsid
- if they have a envelope - CORRECT ANSWER how are viruses categorized?
Destructive mechanism that results in death and lysis of host cell - CORRECT ANSWER lytic
replication
Extended period of dormancy caused by certain bacteriophages - CORRECT ANSWER
lysogenic replication
Temporary or permanent dormancy elicited by certain types of animal viruses - CORRECT ANSWER
latent replication
1. Attachment
2. Entry
3. Synthesis
4. Assembly
5. Release - CORRECT ANSWER lytic replication cycle
Perios of time required to complete entire lytic process - CORRECT ANSWER burst time
Total number of new virions - CORRECT ANSWER burst size
1. Attachment
2. Entry
3. Integration
, 4. Synthesis
5. Assembly
6. Release - CORRECT ANSWER lysogentic replication cycle
- presence of envelopes around some animal viruses
- eukaryotic nature of animal cells
- lack of cell wall - CORRECT ANSWER what is the differences between lytic replication in
bacteriophages and animal viruses?
T - CORRECT ANSWER T/F sniaml viruses do not have tails/tail fibers like many
bacteriophages
- direct (nonenveloped)
- membrane fusion (enveloped)
- phagocytosis (enveloped) - CORRECT ANSWER what are the three mechanisms of entry?
Types of penetration - CORRECT ANSWER
Nucleus, cytoplasm - CORRECT ANSWER most DNA viruses assemble in and are released
from the ______ into _______
Cytoplasm - CORRECT ANSWER most RNA viruses develops solely in the ______
Cause persistent infections as they are released slowly from the host cell; budding one-by-one -
CORRECT ANSWER enveloped viruses
Viruses are released by exocytosis or may cause lysis and death of host cell - CORRECT ANSWER
nonenveloped viruses
Permenet - CORRECT ANSWER when a provirus is incorporated into host DNA, condition is
_______
AND CORRECT ANSWERS
-minuscule, acellular infectious agents carrying DNA or RNA
-obligate intracellular parasites - CORRECT ANSWER viruses
F - CORRECT ANSWER T/F viruses have cytoplasmic membranes, cytosol, and organelles
Virons - CORRECT ANSWER when viruses are outside their host they are called what?
- possess a protein coat (capsid) that surrounds and protects the nucleic acid (viral genome) -
CORRECT ANSWER what is the structure of a virus?
-shed their protein capsids
-exist as naked nucleic acid - CORRECT ANSWER when inside their cellular hosts viruses do
what?
- genetic material
- capsid - CORRECT ANSWER what are required features of a virus?
- envelope
- appendages
- enzymes - CORRECT ANSWER what are optional features of a virus?
A phospholipid bilayer and proteins - CORRECT ANSWER the viral envelope is composed of
what?
Glycoprotein spikes - CORRECT ANSWER some viral proteins have ___________ that are
encoded by the viral genome
Viral replication - CORRECT ANSWER viral envelopes are acquired from host cell during?
,Narrow - CORRECT ANSWER do viruses have a broad or narrow host range?
- type of genetic material
- host range
- size and shape of virus
- structure of capsid
- if they have a envelope - CORRECT ANSWER how are viruses categorized?
Destructive mechanism that results in death and lysis of host cell - CORRECT ANSWER lytic
replication
Extended period of dormancy caused by certain bacteriophages - CORRECT ANSWER
lysogenic replication
Temporary or permanent dormancy elicited by certain types of animal viruses - CORRECT ANSWER
latent replication
1. Attachment
2. Entry
3. Synthesis
4. Assembly
5. Release - CORRECT ANSWER lytic replication cycle
Perios of time required to complete entire lytic process - CORRECT ANSWER burst time
Total number of new virions - CORRECT ANSWER burst size
1. Attachment
2. Entry
3. Integration
, 4. Synthesis
5. Assembly
6. Release - CORRECT ANSWER lysogentic replication cycle
- presence of envelopes around some animal viruses
- eukaryotic nature of animal cells
- lack of cell wall - CORRECT ANSWER what is the differences between lytic replication in
bacteriophages and animal viruses?
T - CORRECT ANSWER T/F sniaml viruses do not have tails/tail fibers like many
bacteriophages
- direct (nonenveloped)
- membrane fusion (enveloped)
- phagocytosis (enveloped) - CORRECT ANSWER what are the three mechanisms of entry?
Types of penetration - CORRECT ANSWER
Nucleus, cytoplasm - CORRECT ANSWER most DNA viruses assemble in and are released
from the ______ into _______
Cytoplasm - CORRECT ANSWER most RNA viruses develops solely in the ______
Cause persistent infections as they are released slowly from the host cell; budding one-by-one -
CORRECT ANSWER enveloped viruses
Viruses are released by exocytosis or may cause lysis and death of host cell - CORRECT ANSWER
nonenveloped viruses
Permenet - CORRECT ANSWER when a provirus is incorporated into host DNA, condition is
_______
