BIMM 121 Exam 2 questions and
answers graded A+
Which microbial strains are always present in yogurt? (Aka the control strains) - correct answer
✔✔ Streptococcus thermophilus
Lactobacillus bulgaricus
What classification do the control strains fall under? - correct answer ✔✔ Thermophiles
What is the optimal temp for thermophiles? - correct answer ✔✔ ~ 60 C
5 Temperature Classifications of Microbes - correct answer ✔✔ 1) Psychrophiles
2) Psychographs
3) Mesophiles
4) Thermophiles
5) Hyperthermophiles
Mesophile Optimal Temp - correct answer ✔✔ ~ 39
What type of fermentation do streptococcus and lactobacillus use to ferment lactose and
produce lactic acid? - correct answer ✔✔ Homolactic Fermentation
Lactose is a disaccharide of what two molecules? - correct answer ✔✔ glucose and galactose
What bond connects the disaccharides that makes glucose? - correct answer ✔✔ B glycosidic
bond
, What type of bacteria is found in yogurt? - correct answer ✔✔ Lactic Acid Bacteria
Which three strains make up LAB? - correct answer ✔✔ Lactobacillus
Lactococcus
Streptococcus
Anabolic Rxn - correct answer ✔✔ Synthesis of organic compounds
Catabolic Rxn - correct answer ✔✔ Breaking down of organic compounds
What is the best electron accepter in respiration? - correct answer ✔✔ O2
What three processes make up respirtation? - correct answer ✔✔ Glycolysis, Kreb Cycle, ETC
Glycolysis - correct answer ✔✔ - Found in almost all microbes
- Occurs in cytoplasmic matrix
- Can function with or without O2
- Divided into 2 phases
End products of glycolysis - correct answer ✔✔ 2 Net ATP and 2 NADH
What happens after glycolysis? - correct answer ✔✔ Fermentation
Purpose of Fermentation - correct answer ✔✔ To reform NAD+ from NADH to keep glycolysis
going
answers graded A+
Which microbial strains are always present in yogurt? (Aka the control strains) - correct answer
✔✔ Streptococcus thermophilus
Lactobacillus bulgaricus
What classification do the control strains fall under? - correct answer ✔✔ Thermophiles
What is the optimal temp for thermophiles? - correct answer ✔✔ ~ 60 C
5 Temperature Classifications of Microbes - correct answer ✔✔ 1) Psychrophiles
2) Psychographs
3) Mesophiles
4) Thermophiles
5) Hyperthermophiles
Mesophile Optimal Temp - correct answer ✔✔ ~ 39
What type of fermentation do streptococcus and lactobacillus use to ferment lactose and
produce lactic acid? - correct answer ✔✔ Homolactic Fermentation
Lactose is a disaccharide of what two molecules? - correct answer ✔✔ glucose and galactose
What bond connects the disaccharides that makes glucose? - correct answer ✔✔ B glycosidic
bond
, What type of bacteria is found in yogurt? - correct answer ✔✔ Lactic Acid Bacteria
Which three strains make up LAB? - correct answer ✔✔ Lactobacillus
Lactococcus
Streptococcus
Anabolic Rxn - correct answer ✔✔ Synthesis of organic compounds
Catabolic Rxn - correct answer ✔✔ Breaking down of organic compounds
What is the best electron accepter in respiration? - correct answer ✔✔ O2
What three processes make up respirtation? - correct answer ✔✔ Glycolysis, Kreb Cycle, ETC
Glycolysis - correct answer ✔✔ - Found in almost all microbes
- Occurs in cytoplasmic matrix
- Can function with or without O2
- Divided into 2 phases
End products of glycolysis - correct answer ✔✔ 2 Net ATP and 2 NADH
What happens after glycolysis? - correct answer ✔✔ Fermentation
Purpose of Fermentation - correct answer ✔✔ To reform NAD+ from NADH to keep glycolysis
going
