BIMM 121 - Final Review questions
well answered graded A+
How is yogurt made (procedure)? - correct answer ✔✔ 1) Milk is scalded
2) Starter bact added
3) Temp drop to 43-46 C
4) Temp drop to 25-30 C
5) Optional: Store at 4 C
What is the bacteria growth rate curve? - correct answer ✔✔ The curve that shows optimal and
inactive enzymatic activity
Psychrophile - correct answer ✔✔ Likes cold
Mesophile - correct answer ✔✔ Middle temp preference
Thermophile - correct answer ✔✔ Likes heat
What type of fermentation do LAB in our lab do? - correct answer ✔✔ Homolactic fermentation
Equation for lactic acid fermentation - correct answer ✔✔ pyruvic acid + NADH + H+ --> lactic
acid + NAD+
enzyme for lactic acid fermentation - correct answer ✔✔ lactate dehydrogenase
, How is lactose intaked? - correct answer ✔✔ via lactose permease
anabolic metabolism - correct answer ✔✔ building up; energy required
catabolic metabolism - correct answer ✔✔ breaking down; energy releasing
Glycolysis Equation - correct answer ✔✔ Glucose + 2 Pi + ADP + NAD+ --> 2 pyruvate, 2 ATP, 2
NADH, 2H, 2H2O
Final electron acceptor for aerobic respiration - correct answer ✔✔ Oxygen (--> H2O)
How do anaerobes harness energy - correct answer ✔✔ Use other electron acceptor
(i.e. Sulfur Resp./Fixation)
5 types of Oxygen Needs - correct answer ✔✔ 1) Strictly Aerobe
2) Strictly Anaerobe
3) Facultative Anaerobe
4) Microaerophile
5) Aerotolerant Anaerobe
What makes yogurt sweet? - correct answer ✔✔ galactose - not used by LAB, split from glucose
in lactose
What causes curdling? - correct answer ✔✔ Calcium caseinate forms casein --> Casein
denatures due to low pH and separates from whey of milk == curdling
pH of yogurt - correct answer ✔✔ =<4.6
well answered graded A+
How is yogurt made (procedure)? - correct answer ✔✔ 1) Milk is scalded
2) Starter bact added
3) Temp drop to 43-46 C
4) Temp drop to 25-30 C
5) Optional: Store at 4 C
What is the bacteria growth rate curve? - correct answer ✔✔ The curve that shows optimal and
inactive enzymatic activity
Psychrophile - correct answer ✔✔ Likes cold
Mesophile - correct answer ✔✔ Middle temp preference
Thermophile - correct answer ✔✔ Likes heat
What type of fermentation do LAB in our lab do? - correct answer ✔✔ Homolactic fermentation
Equation for lactic acid fermentation - correct answer ✔✔ pyruvic acid + NADH + H+ --> lactic
acid + NAD+
enzyme for lactic acid fermentation - correct answer ✔✔ lactate dehydrogenase
, How is lactose intaked? - correct answer ✔✔ via lactose permease
anabolic metabolism - correct answer ✔✔ building up; energy required
catabolic metabolism - correct answer ✔✔ breaking down; energy releasing
Glycolysis Equation - correct answer ✔✔ Glucose + 2 Pi + ADP + NAD+ --> 2 pyruvate, 2 ATP, 2
NADH, 2H, 2H2O
Final electron acceptor for aerobic respiration - correct answer ✔✔ Oxygen (--> H2O)
How do anaerobes harness energy - correct answer ✔✔ Use other electron acceptor
(i.e. Sulfur Resp./Fixation)
5 types of Oxygen Needs - correct answer ✔✔ 1) Strictly Aerobe
2) Strictly Anaerobe
3) Facultative Anaerobe
4) Microaerophile
5) Aerotolerant Anaerobe
What makes yogurt sweet? - correct answer ✔✔ galactose - not used by LAB, split from glucose
in lactose
What causes curdling? - correct answer ✔✔ Calcium caseinate forms casein --> Casein
denatures due to low pH and separates from whey of milk == curdling
pH of yogurt - correct answer ✔✔ =<4.6
