MIC 205 EXAM 3 DAYDIF DOWNTOWN
COMPLETE QUESTIONS AND
ANSWERS
\.minuscule, acellular infectious agents carrying one or several pieces of either
DNA or RNA - ANSWERS✔-viruses
\.viruses are obligate ______ _____ - ANSWERS✔-intracellular parasites
\.viruses outside the host - ANSWERS✔-virions
\.Outer protein coat of a virus - ANSWERS✔-capsid
\.genetic material of a virus - ANSWERS✔-viral genome
\.additional features of visions - ANSWERS✔-enzymes, glycoproteins, envelope
\.T/F: viruses cannot carry out any metabolic reactions - ANSWERS✔-true because
they lack organelles
\.T/F: viruses cannot reproduce independently - ANSWERS✔-true
,\.T/F: viruses neither grow in size nor respond to their environment - ANSWERS✔-
true
\.T/F: viral envelopes are present on all animal viruses - ANSWERS✔-false
\.composed of phospholipid bilayer and proteins; need moisture - ANSWERS✔-
viral envelope
\.The envelope contains ________ , which are encoded by the virus. - ANSWERS✔-
glycoprotein spikes
\.Often play a role in host recognition - ANSWERS✔-envelope proteins and
glycoproteins
\.How are viral envelopes acquired? - ANSWERS✔-acquired from host cell during
viral replication
\.how do enveloped animal viruses surround themselves? - ANSWERS✔-in stolen
membrane material that looks like the host cell
\.refers to the specific kinds of cells a virus can infect; these are most viruses -
ANSWERS✔-viral specificity
,\.why does viral selectivity exist? - ANSWERS✔-due to the affinity of viral surface
proteins or glycoproteins for complementary proteins or glycoproteins on the host
cell surface
\.example of general virus - ANSWERS✔-influenza because it can infect multiple
organisms
\.how are viruses categorized? - ANSWERS✔-genetic material
\.T/F: viruses can contain both DNA and RNA - ANSWERS✔-false it must be either
or
\.4 additional ways viruses can be categorized - ANSWERS✔-1. kinds of cells they
infect (host range)
2. size and shape
3. structure of capsid
4. presence or absence of an envelope
\.which type of virus is harder to control: enveloped or non-enveloped? -
ANSWERS✔-non-enveloped
\.3 types of viral replication - ANSWERS✔-1. lytic
2. lysogenic
3. latent
, \.destructive mechanism that results in death and degradation (lysis) of host cell -
ANSWERS✔-lytic replication
\.extended period of dormancy initiated by certain bacteriophages - ANSWERS✔-
lysogenic replication
\.temporary or permanent dormancy elicited by certain types of animal viruses -
ANSWERS✔-latent replication
\.lytic replication steps - ANSWERS✔-1. attachment
2. penetration
3. replication
4. assembly
5. release
\.period of time required to complete entire lytic process, from attachment to
release - ANSWERS✔-burst time
\.total number of new virions released from a given population of lysed bacterial
cells - ANSWERS✔-burst size
\.lysogenic/latent replication steps - ANSWERS✔-1. attachement
2. entry
COMPLETE QUESTIONS AND
ANSWERS
\.minuscule, acellular infectious agents carrying one or several pieces of either
DNA or RNA - ANSWERS✔-viruses
\.viruses are obligate ______ _____ - ANSWERS✔-intracellular parasites
\.viruses outside the host - ANSWERS✔-virions
\.Outer protein coat of a virus - ANSWERS✔-capsid
\.genetic material of a virus - ANSWERS✔-viral genome
\.additional features of visions - ANSWERS✔-enzymes, glycoproteins, envelope
\.T/F: viruses cannot carry out any metabolic reactions - ANSWERS✔-true because
they lack organelles
\.T/F: viruses cannot reproduce independently - ANSWERS✔-true
,\.T/F: viruses neither grow in size nor respond to their environment - ANSWERS✔-
true
\.T/F: viral envelopes are present on all animal viruses - ANSWERS✔-false
\.composed of phospholipid bilayer and proteins; need moisture - ANSWERS✔-
viral envelope
\.The envelope contains ________ , which are encoded by the virus. - ANSWERS✔-
glycoprotein spikes
\.Often play a role in host recognition - ANSWERS✔-envelope proteins and
glycoproteins
\.How are viral envelopes acquired? - ANSWERS✔-acquired from host cell during
viral replication
\.how do enveloped animal viruses surround themselves? - ANSWERS✔-in stolen
membrane material that looks like the host cell
\.refers to the specific kinds of cells a virus can infect; these are most viruses -
ANSWERS✔-viral specificity
,\.why does viral selectivity exist? - ANSWERS✔-due to the affinity of viral surface
proteins or glycoproteins for complementary proteins or glycoproteins on the host
cell surface
\.example of general virus - ANSWERS✔-influenza because it can infect multiple
organisms
\.how are viruses categorized? - ANSWERS✔-genetic material
\.T/F: viruses can contain both DNA and RNA - ANSWERS✔-false it must be either
or
\.4 additional ways viruses can be categorized - ANSWERS✔-1. kinds of cells they
infect (host range)
2. size and shape
3. structure of capsid
4. presence or absence of an envelope
\.which type of virus is harder to control: enveloped or non-enveloped? -
ANSWERS✔-non-enveloped
\.3 types of viral replication - ANSWERS✔-1. lytic
2. lysogenic
3. latent
, \.destructive mechanism that results in death and degradation (lysis) of host cell -
ANSWERS✔-lytic replication
\.extended period of dormancy initiated by certain bacteriophages - ANSWERS✔-
lysogenic replication
\.temporary or permanent dormancy elicited by certain types of animal viruses -
ANSWERS✔-latent replication
\.lytic replication steps - ANSWERS✔-1. attachment
2. penetration
3. replication
4. assembly
5. release
\.period of time required to complete entire lytic process, from attachment to
release - ANSWERS✔-burst time
\.total number of new virions released from a given population of lysed bacterial
cells - ANSWERS✔-burst size
\.lysogenic/latent replication steps - ANSWERS✔-1. attachement
2. entry
