Biol 2051 Lab Midterm Questions with
complete solution 2025
Binomial name - correct answers unique name to a species
Genus - correct answers capitalized and italicized (Ex: Escherichia); first part
of the binomial name
Species - correct answers second part of the binomial name, is not capitalized
and never abbreviated (Ex: coil)
Strains - correct answers an organism that has not yet been officially names.
A single species can contain a # of strains.
Phylogenetic tree - correct answers similar to family trees and show how one
organim is related to another one
Medium - correct answers where microorganims are grown in the laboratory.
The culture medium contains nutrients, such as nitrogen and carbon, required
for cells to grow.
Complex medium - correct answers composed of digests of chemically
undefined substances such as yeasts and meat extracts
Defined medium - correct answers one of which a precise chemical
composition is known
Broth - correct answers liquid form of a culture medium
,Solid medium - correct answers contains a solidifying agent (usually agar)
Plates - correct answers soild media in Petri dishes
Deeps - correct answers test tubes containing solid medium, which has been
allowed to solidify in an upright position, and are usually used for anaerobis
growth
Slants - correct answers test tubes containing solid medium that has been
allowed to solidify at an angle and the surface of the agar is used for the
maintenance of stock cultures of microorganisms
Sterilization - correct answers the killing or removal of all living organisms and
their viruses from a growth medium
Autoclave - correct answers a sealed device that allows the entrance of steam
under pressure
Dry heat sterilization - correct answers kills by oxidation effects
Flaming - correct answers one of the simplest methods of dry heat sterilization
Hot-air sterilization - correct answers sterilized by placing in an oven and
heated to 170°C for 2 hours 9used for glassware)
Filtration - correct answers sterilizes heat-sensitive liquids or gases
, Chemosterilizers - correct answers how heat senstive objects such as plastic
Petri dishes are sterilized
Ethylene oxide - correct answers •a widely used gas in gaseous
chemosterilizers
•made use of the plastic Petri disk and plastic syringe possible
Cold-sterilization - correct answers no heat is used in the process
Electromagnetic radiation - correct answers can also be used to sterilized
many substances such as microwaves, ultravoilet radiation, X-rays, gamma
rays, and electrons
UV radiation - correct answers causes damage the to (thymine dimers)
leading to the death of exposed organisms
Ionizing radiation - correct answers causes ions and othe reactive molecules
to be produced and these reactive molecules can degrade or alter
biolpolymers such as DNA and proteins
Pathogenic - correct answers disease causing for humans
Nosocomial - correct answers hospital acquired
Infectious dose - correct answers the # of microorganisms or viruses sufficient
to establish an infection
Resident microflora - correct answers established themselves in or on the
body, but do not produce disease under normal conditions
complete solution 2025
Binomial name - correct answers unique name to a species
Genus - correct answers capitalized and italicized (Ex: Escherichia); first part
of the binomial name
Species - correct answers second part of the binomial name, is not capitalized
and never abbreviated (Ex: coil)
Strains - correct answers an organism that has not yet been officially names.
A single species can contain a # of strains.
Phylogenetic tree - correct answers similar to family trees and show how one
organim is related to another one
Medium - correct answers where microorganims are grown in the laboratory.
The culture medium contains nutrients, such as nitrogen and carbon, required
for cells to grow.
Complex medium - correct answers composed of digests of chemically
undefined substances such as yeasts and meat extracts
Defined medium - correct answers one of which a precise chemical
composition is known
Broth - correct answers liquid form of a culture medium
,Solid medium - correct answers contains a solidifying agent (usually agar)
Plates - correct answers soild media in Petri dishes
Deeps - correct answers test tubes containing solid medium, which has been
allowed to solidify in an upright position, and are usually used for anaerobis
growth
Slants - correct answers test tubes containing solid medium that has been
allowed to solidify at an angle and the surface of the agar is used for the
maintenance of stock cultures of microorganisms
Sterilization - correct answers the killing or removal of all living organisms and
their viruses from a growth medium
Autoclave - correct answers a sealed device that allows the entrance of steam
under pressure
Dry heat sterilization - correct answers kills by oxidation effects
Flaming - correct answers one of the simplest methods of dry heat sterilization
Hot-air sterilization - correct answers sterilized by placing in an oven and
heated to 170°C for 2 hours 9used for glassware)
Filtration - correct answers sterilizes heat-sensitive liquids or gases
, Chemosterilizers - correct answers how heat senstive objects such as plastic
Petri dishes are sterilized
Ethylene oxide - correct answers •a widely used gas in gaseous
chemosterilizers
•made use of the plastic Petri disk and plastic syringe possible
Cold-sterilization - correct answers no heat is used in the process
Electromagnetic radiation - correct answers can also be used to sterilized
many substances such as microwaves, ultravoilet radiation, X-rays, gamma
rays, and electrons
UV radiation - correct answers causes damage the to (thymine dimers)
leading to the death of exposed organisms
Ionizing radiation - correct answers causes ions and othe reactive molecules
to be produced and these reactive molecules can degrade or alter
biolpolymers such as DNA and proteins
Pathogenic - correct answers disease causing for humans
Nosocomial - correct answers hospital acquired
Infectious dose - correct answers the # of microorganisms or viruses sufficient
to establish an infection
Resident microflora - correct answers established themselves in or on the
body, but do not produce disease under normal conditions
