Auburn BIOL 3201 Lab Final Exam With 100% Correct Answers Updated.

Auburn BIOL 3201 Lab Final Exam With
100% Correct Answers 2026-2027
Updated.
Staphylococcus aureus



test results - Answer MSA: growth+/acid+



coagulase: +



(some) Streptococcus, Enterococcus



test results - Answer SBA: beta

bile esculin: +



Enterobacter, Serratia, (some) Erwinia, Aeromonas



test results - Answer butanediol fermentation (VP test +)



Enterobacter aerogenes, Salmonella typhimuirium



test results - Answer citrate utilization: +



Pseudomonas



test results - Answer oxidase: +



Paracoccus, Pseudomonas, Bacillus, E. coli



test results - Answer nitrate test (varying results)



Proteus, Providencia, Marganella



test results - Answer urea hydrolysis: +

, phenylalanine deamination: +



E. coli, Enterobacter aerogenes



test results - Answer M: + V: - I: + C: -



M: - V: + I: - C: +



Proteus mirabilis



test results - Answer swarming motility: +



Bacitracin disk



(susceptibility to bacitracin) - Answer positive = any size zone of inhibition



negative = no zone of inhibition



BHI broth



(ability to grow in 6.5% NaCl) - Answer positive: growth (turbidity)



negative: no growth (clear)



Bile esculin



(ability to hydrolyze esculin to esculetin and dextrose) - Answer positive: blacking of the entire
slant



negative: no color change or less than 1/2 of the slant is black



catalase



(ability to produce catalase) - Answer positive: bubbles