WorksheetsPage 1
Total questions: 10
Worksheet time: 2mins
Which microorganism is responsible for the fermentation of milk into yogurt?
Lactobacillus bulgaricus
Escherichia coli
Saccharomyces cerevisiae
Streptococcus thermophilus
What is the primary substrate utilized in fermentation?
Protein
Carbohydrate
Fat
Nucleic acid
Yeast ferments glucose to ethanol. Which co-product is released to the environment?
Nitrogen gas
Carbon dioxide
Hydrogen gas
Ozone
During lactic acid fermentation in muscle, which molecule accepts electrons from NADH to regenerate NAD+?
Pyruvate
Citrate
Acetyl-CoA
Oxaloacetate
Which condition most strongly favors anaerobic fermentation in a bioreactor?
Oxidative metabolic flux
High dissolved oxygen
Strict oxygen exclusion
Continuous aeration
In which type of fermentation is yeast most commonly involved?
Alcoholic fermentation
Lactic acid fermentation
Acetic acid fermentation
Butyric acid fermentation
During alcoholic fermentation, what is the primary starting substrate yeast metabolizes?
Fats
Glucose
Proteins
Nucleic acids
Which pathway provides pyruvate that is subsequently reduced in alcoholic fermentation?
Urea cycle pathway
Beta-oxidation pathway
Glycolytic pathway
Pentose phosphate pathway
Compared to lactic acid fermentation, alcoholic fermentation primarily differs in which main end product?
Ethanol alcohol
Lactate anion
Carbon dioxide gas
Acetate ion
Which organism class commonly carries out lactic acid fermentation rather than alcoholic fermentation?
Yeast fungi
Lactic acid bacteria
Acetic acid bacteria
Clostridium species
