biology : class12 Acetic Acid Production : Food Processing, Industrial Production, Sewage Treatment, Energy Production : Microbes in Human Welfare MCQ Questions and Answers
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Acetic Acid Production
MCQ questions and answers.
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MCQ Questions
1. Which microorganism is commonly used for the production of acetic acid?
A.
Acetobacter aceti
B.
Lactobacillus
C.
Saccharomyces cerevisiae
D.
Penicillium notatum
Correct Answer:
Acetobacter aceti
Explanation:
Acetobacter aceti is used to convert alcohol into acetic acid during vinegar production.
2. Acetic acid is the main acid present in which common household product?
A.
Curd
B.
Vinegar
C.
Bread
D.
Cheese
Correct Answer:
Vinegar
Explanation:
Vinegar contains acetic acid, which is produced by the microbial oxidation of alcohol.
3. Which substance is converted into acetic acid by Acetobacter aceti?
A.
Glucose
B.
Starch
C.
Ethanol
D.
Lactic acid
Correct Answer:
Ethanol
Explanation:
Acetobacter aceti oxidises ethanol, or alcohol, to form acetic acid.
4. The production of acetic acid by Acetobacter aceti requires which condition?
A.
Absence of oxygen
B.
Presence of oxygen
C.
Complete darkness only
D.
Freezing temperature
Correct Answer:
Presence of oxygen
Explanation:
Acetobacter aceti is an aerobic bacterium, so oxygen is needed for converting ethanol into acetic acid.
5. Acetic acid production by Acetobacter aceti is an example of which process?
A.
Oxidation of ethanol
B.
Reduction of glucose
C.
Hydrolysis of starch
D.
Fermentation of proteins
Correct Answer:
Oxidation of ethanol
Explanation:
Acetobacter aceti produces acetic acid by oxidising ethanol in the presence of oxygen.
6. Which bacterium is associated with the conversion of alcohol into vinegar?
A.
Acetobacter aceti
B.
Rhizobium
C.
Nitrosomonas
D.
Bacillus thuringiensis
Correct Answer:
Acetobacter aceti
Explanation:
Acetobacter aceti converts alcohol into acetic acid, which gives vinegar its characteristic sour taste.
7. What is the chemical name of the acid produced during vinegar manufacture?
A.
Citric acid
B.
Lactic acid
C.
Acetic acid
D.
Oxalic acid
Correct Answer:
Acetic acid
Explanation:
Vinegar manufacture involves the microbial production of acetic acid from ethanol.
8. Which raw material is directly used by Acetobacter aceti during acetic acid production?
A.
Alcohol
B.
Cellulose
C.
Proteins
D.
Mineral salts
Correct Answer:
Alcohol
Explanation:
Alcohol, specifically ethanol, serves as the substrate that Acetobacter aceti oxidises to acetic acid.
9. Acetobacter aceti belongs to which group of microorganisms?
A.
Bacteria
B.
Fungi
C.
Algae
D.
Protozoa
Correct Answer:
Bacteria
Explanation:
Acetobacter aceti is a bacterium used industrially for producing acetic acid.
10. What is the main product formed when Acetobacter aceti acts on ethanol in the presence of oxygen?
A.
Methane
B.
Acetic acid
C.
Lactic acid
D.
Carbon monoxide
Correct Answer:
Acetic acid
Explanation:
In the presence of oxygen, Acetobacter aceti converts ethanol into acetic acid, the main component of vinegar.
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