MicroBio Lab Exam #2 With Questions And Answers Latest Update
2026
hydrogen peroxide --> water to oxygen - (answer)The chemical reaction catalysed by catalase is:
mannitol - (answer)The differential agent in Mannitol salt agar is:
lactose and/or sucrose fermenters - (answer)Organisms that take on a pink to dark purple or even black
color on Eosin methylene blue agar are:
basic - (answer)The pH in a positive Simmon's citrate test is:
mixed acids from glucose - (answer)Which test is not determined by use of SIM media?
basic - (answer)In a positive urea test the pH is:
Barritt's A and B - (answer)The reagent added to perform the VP test is:
more information is needed to make a determination - (answer)Any clearing around an antibiotic disk
where no growth of bacteria is visible indicates:
antigen - (answer)In the Staphyloslide agglutination, bacteria act as the potential ______.
dark blue or violet - (answer)In a positive oxidase test a _____ color should be seen within 30 seconds of
applying bacteria to oxidase paper.
triclosan - (answer)The selective agent in Pseudomonas Isolation agar is:
beta - (answer)Organisms that produce clear halos around colony growth on Blood agar plates are said
to be _____ hemolytic.
, MicroBio Lab Exam #2 With Questions And Answers Latest Update
2026
a zone of clearing that is colorless to golden - (answer)A positive starch test can be confirmed after
adding Lugol's reagent. It is indicated by:
Methyl green - (answer)DNAse agar contains the indicator reagent ____ which allows for detection of
the breakdown of DNA by microorganisms.
oxygen gas - (answer)Bubbling of hydrogen peroxide placed on colony growth is a sign of the presence
of the enzyme catalase. This is due to the production of:
casein - (answer)The main substrate available for hydrolysis in skim milk agar is:
phenol red - (answer)The pH indicator found in Mannitol Salt agar is:
basic - (answer)The pH in a positive Simmon's citrate test is:
there is no pH indicator in this media - (answer)he pH indicator present in a phenylalanine deaminase
slant is
cysteine desulfurase - (answer)The enzyme activity responsible for the visible reaction seen in this SIM
tube is:
methyl red - (answer)The reagent used to perform the MR test is:
acetoin - (answer)The end product that is detected by the added reagents in a VP test is:
Mueller-Hinton agar - (answer)Kirby-Bauer (antibiotic disk-diffusion assays) are carried out using _____
plates.
2026
hydrogen peroxide --> water to oxygen - (answer)The chemical reaction catalysed by catalase is:
mannitol - (answer)The differential agent in Mannitol salt agar is:
lactose and/or sucrose fermenters - (answer)Organisms that take on a pink to dark purple or even black
color on Eosin methylene blue agar are:
basic - (answer)The pH in a positive Simmon's citrate test is:
mixed acids from glucose - (answer)Which test is not determined by use of SIM media?
basic - (answer)In a positive urea test the pH is:
Barritt's A and B - (answer)The reagent added to perform the VP test is:
more information is needed to make a determination - (answer)Any clearing around an antibiotic disk
where no growth of bacteria is visible indicates:
antigen - (answer)In the Staphyloslide agglutination, bacteria act as the potential ______.
dark blue or violet - (answer)In a positive oxidase test a _____ color should be seen within 30 seconds of
applying bacteria to oxidase paper.
triclosan - (answer)The selective agent in Pseudomonas Isolation agar is:
beta - (answer)Organisms that produce clear halos around colony growth on Blood agar plates are said
to be _____ hemolytic.
, MicroBio Lab Exam #2 With Questions And Answers Latest Update
2026
a zone of clearing that is colorless to golden - (answer)A positive starch test can be confirmed after
adding Lugol's reagent. It is indicated by:
Methyl green - (answer)DNAse agar contains the indicator reagent ____ which allows for detection of
the breakdown of DNA by microorganisms.
oxygen gas - (answer)Bubbling of hydrogen peroxide placed on colony growth is a sign of the presence
of the enzyme catalase. This is due to the production of:
casein - (answer)The main substrate available for hydrolysis in skim milk agar is:
phenol red - (answer)The pH indicator found in Mannitol Salt agar is:
basic - (answer)The pH in a positive Simmon's citrate test is:
there is no pH indicator in this media - (answer)he pH indicator present in a phenylalanine deaminase
slant is
cysteine desulfurase - (answer)The enzyme activity responsible for the visible reaction seen in this SIM
tube is:
methyl red - (answer)The reagent used to perform the MR test is:
acetoin - (answer)The end product that is detected by the added reagents in a VP test is:
Mueller-Hinton agar - (answer)Kirby-Bauer (antibiotic disk-diffusion assays) are carried out using _____
plates.
