Microbial Resistance &Micro Lab Exam 4 : Endospores, UV Radiation,
Moist Heat Sterilization, Disinfection vs Sterilization, Vegetative Cells,
Halogens, Selective Toxicity, Broad vs Narrow Spectrum Antibiotics,
Antiseptics, Disinfectants, Zones of Inhibition, Antibiotic Susceptibility
Testing, Commensalism, Synergism, Amensalism, Parasitism, PFUs,
Lawn Technique, Turbidity, Gram Stain, Membrane Integrity, B.
subtilis, E. coli, Staphylococcus, Proteus, Microbial Interactions,
Resistance Mechanisms, Time-Dependent Killing, Microbial Sensitivity
Variation Exam Questions Verified and Provided with Complete A+
Graded Rationales Latest Updated 2026
What do some species create that allow them to tolerate ultraviolet light?
Endospores
Boiling is an example of ________ heat that can efficiently destroy bacterial vegetative cells.
Moist
By sampling and inoculating organisms after exposure to boiling we are testing for
, Whether or not the organism could survive boiling conditions
Ultraviolet light is a form of:
non ionizing radiation
What is the definition of sterilization and how does it differ from disinfection?
Sterilization refers to killing all microbes, viruses, endospores, etc. from a material. It should be
completely free of living organisms or anything that can revert from a dormant state to a living
organism. If you disinfect something you are simply removing some living organisms.
One of the cultures of B. subtilis used for both boiling and UV experiments was a week old. Why
was it important to continue the growth past the typical 48hrs?
to represent different forms encountered daily
to make sure it had spores
Did vegetative cells of an endospore former have any additional resistance to boiling than a
non-endospore former? Why or why not?
As long as the cells are in a full vegetative state they should not have any additional resistance
to boiling than a non-endospore former.
What are the limitations to using UV for sterilization?
-UV light has limited penetration power (wont go through glass, plastic, pigmented organisms,
etc.)
Moist Heat Sterilization, Disinfection vs Sterilization, Vegetative Cells,
Halogens, Selective Toxicity, Broad vs Narrow Spectrum Antibiotics,
Antiseptics, Disinfectants, Zones of Inhibition, Antibiotic Susceptibility
Testing, Commensalism, Synergism, Amensalism, Parasitism, PFUs,
Lawn Technique, Turbidity, Gram Stain, Membrane Integrity, B.
subtilis, E. coli, Staphylococcus, Proteus, Microbial Interactions,
Resistance Mechanisms, Time-Dependent Killing, Microbial Sensitivity
Variation Exam Questions Verified and Provided with Complete A+
Graded Rationales Latest Updated 2026
What do some species create that allow them to tolerate ultraviolet light?
Endospores
Boiling is an example of ________ heat that can efficiently destroy bacterial vegetative cells.
Moist
By sampling and inoculating organisms after exposure to boiling we are testing for
, Whether or not the organism could survive boiling conditions
Ultraviolet light is a form of:
non ionizing radiation
What is the definition of sterilization and how does it differ from disinfection?
Sterilization refers to killing all microbes, viruses, endospores, etc. from a material. It should be
completely free of living organisms or anything that can revert from a dormant state to a living
organism. If you disinfect something you are simply removing some living organisms.
One of the cultures of B. subtilis used for both boiling and UV experiments was a week old. Why
was it important to continue the growth past the typical 48hrs?
to represent different forms encountered daily
to make sure it had spores
Did vegetative cells of an endospore former have any additional resistance to boiling than a
non-endospore former? Why or why not?
As long as the cells are in a full vegetative state they should not have any additional resistance
to boiling than a non-endospore former.
What are the limitations to using UV for sterilization?
-UV light has limited penetration power (wont go through glass, plastic, pigmented organisms,
etc.)
