- The fermentation process of sourdough bread involves which microorganism?
A. Lactobacillus sanfranciscensis
B. Aspergillus niger
C. Saccharomyces cerevisiae
D. Rhizopus stolonifer
Answer: A. Lactobacillus sanfranciscensis
Explanation:
Lactobacillus sanfranciscensis is responsible for the lactic acid fermentation in sourdough bread, giving it its tangy flavor and texture.
- The microorganism involved in the production of biogas is:
A. Lactobacillus acidophilus
B. Methanobacterium
C. Pseudomonas putida
D. Saccharomyces cerevisiae
Answer: B. Methanobacterium
Explanation:
Methanobacterium plays a key role in the anaerobic digestion process in biogas plants, producing methane gas as a renewable energy source.
- Which of the following microbes is used in the production of protease enzymes in the detergent industry?
A. Bacillus licheniformis
B. Aspergillus oryzae
C. Rhizopus stolonifer
D. Lactobacillus bulgaricus
Answer: A. Bacillus licheniformis
Explanation:
Bacillus licheniformis is used in the production of protease enzymes, which are added to detergents to break down proteins and remove stains.
- The microorganism responsible for the spoilage of bread by causing mold is:
A. Penicillium notatum
B. Rhizopus stolonifer
C. Aspergillus niger
D. Lactobacillus
Answer: B. Rhizopus stolonifer
Explanation:
Rhizopus stolonifer is a fungus that causes mold on bread, leading to its spoilage by decomposing the carbohydrates.
- The microorganism used to produce alcohol-free beer is:
A. Saccharomyces cerevisiae
B. Saccharomyces pastorianus
C. Lactobacillus
D. Escherichia coli
Answer: B. Saccharomyces pastorianus
Explanation:
Saccharomyces pastorianus is a yeast strain used in brewing processes to produce low-alcohol or alcohol-free beer by reducing ethanol production during fermentation.
- Which bacterium is used in the conversion of ammonia to nitrate in the nitrogen cycle?
A. Nitrosomonas
B. Azotobacter
C. Rhizobium
D. Pseudomonas
Answer: A. Nitrosomonas
Explanation:
Nitrosomonas bacteria oxidize ammonia into nitrite, an important step in the nitrification process of the nitrogen cycle.
- The bacterium used for the production of single-cell protein (SCP) is:
A. Chlorella
B. Candida utilis
C. Rhizopus
D. Saccharomyces cerevisiae
Answer: B. Candida utilis
Explanation:
Candida utilis is a yeast used in the production of single-cell protein, which is a protein-rich food source derived from microbial cells.
- The fungus that produces the enzyme amylase for the conversion of starch into sugars is:
A. Aspergillus oryzae
B. Penicillium notatum
C. Rhizopus stolonifer
D. Saccharomyces cerevisiae
Answer: A. Aspergillus oryzae
Explanation:
Aspergillus oryzae produces the enzyme amylase, which breaks down starches into simpler sugars, and is used in food processing industries like brewing.
- Which microbe is used to produce antibiotics like streptomycin?
A. Streptomyces griseus
B. Bacillus subtilis
C. Penicillium notatum
D. Escherichia coli
Answer: A. Streptomyces griseus
Explanation:
Streptomyces griseus is a soil bacterium that produces the antibiotic streptomycin, which is used to treat bacterial infections.
- The bacterium used in the production of acetic acid from ethanol is:
A. Acetobacter aceti
B. Escherichia coli
C. Bacillus subtilis
D. Streptomyces griseus
Answer: A. Acetobacter aceti
Explanation:
Acetobacter aceti oxidizes ethanol into acetic acid, a process used in the production of vinegar.
- The fungus responsible for the fermentation process in tempeh production is:
A. Rhizopus oligosporus
B. Aspergillus oryzae
C. Penicillium notatum
D. Saccharomyces cerevisiae
Answer: A. Rhizopus oligosporus
Explanation:
Rhizopus oligosporus is used to ferment soybeans into tempeh, a traditional Indonesian food rich in protein.
Leave a comment