Exam (elaborations)
Mic 205 Exam 3 Daydiff/143 Questions with Answers
Mic 205 Exam 3 Daydiff/143 Questions with Answers
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Mic 205 Exam 3 Daydiff/143Questions with Answers
-minuscule, acellular infectious agents carrying DNA or RNA
-obligate intracellular parasites - - viruses
- F - - T/F viruses have cytoplasmic membranes, cytosol, and organelles
- virons - - when viruses are outside their host they are called what?
- - possess a protein coat (capsid) that surrounds and protects the nucleic
acid (viral genome) - - what is the structure of a virus?
- -shed their protein capsids
-exist as naked nucleic acid - - when inside their cellular hosts viruses do
what?
- - genetic material
- capsid - - what are required features of a virus?
- - envelope
- appendages
- enzymes - - what are optional features of a virus?
- a phospholipid bilayer and proteins - - the viral envelope is composed of
what?
- glycoprotein spikes - - some viral proteins have ___________ that are
encoded by the viral genome
- viral replication - - viral envelopes are acquired from host cell during?
- narrow - - 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 - - how are viruses categorized?
- destructive mechanism that results in death and lysis of host cell - - lytic
replication
, - extended period of dormancy caused by certain bacteriophages - -
lysogenic replication
- temporary or permanent dormancy elicited by certain types of animal
viruses - - latent replication
- 1. attachment
2. entry
3. synthesis
4. assembly
5. release - - lytic replication cycle
- perios of time required to complete entire lytic process - - burst time
- total number of new virions - - burst size
- 1. attachment
2. entry
3. integration
4. synthesis
5. assembly
6. release - - lysogentic replication cycle
- - presence of envelopes around some animal viruses
- eukaryotic nature of animal cells
- lack of cell wall - - what is the differences between lytic replication in
bacteriophages and animal viruses?
- T - - T/F sniaml viruses do not have tails/tail fibers like many
bacteriophages
- - direct (nonenveloped)
- membrane fusion (enveloped)
- phagocytosis (enveloped) - - what are the three mechanisms of entry?
- types of penetration - -
- nucleus, cytoplasm - - most DNA viruses assemble in and are released
from the ______ into _______
- cytoplasm - - most RNA viruses develops solely in the ______
- cause persistent infections as they are released slowly from the host cell;
budding one-by-one - - enveloped viruses
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