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Discussion
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Microbiology
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Wine and Beer
Comments
Question
The spoilage most commonly occurring in wine is tourne which refers to
Options
A. acid formation from aldehyde and ketones
B. acid formation from sugars, glucose and fructose
C. both (a) and (b)
D. none of the above
Correct Answer
acid formation from sugars, glucose and fructose
Wine and Beer problems
Search Results
1. Acetic acid bacteria spoiling musts and wines are inhibited by
Options
A. 5-7% alcohol by volume
B. 14-15% alcohol by volume
C. 24-25% alcohol by volume
D. 30-35% alcohol by volume
Show Answer
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Discuss
Correct Answer: 14-15% alcohol by volume
2. Which of the following is not an ale type of beer?
Options
A. Weiss beer
B. Porterr
C. Stout
D. Pilsener
Show Answer
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Discuss
Correct Answer: Pilsener
3. If the mash in the brewhouse is held too long it may undergo
Options
A. butyric acid fermentation
B. lactic acid fermentation
C. both (a) and (b)
D. citric acid fermentation
Show Answer
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Discuss
Correct Answer: both (a) and (b)
4. Most important species of vinegar bacteria causing sliminess is
Options
A.
Acetobacter aceti
B.
Saccharomyces carlsbergiensis
C.
Lactobacillus lactis
D. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer:
Acetobacter aceti
5. The potential spoilage organism in beer is
Options
A.
Saccharomyces diastaticus
B.
S. carlsbergensis
C.
S. cerevisiae
D.
S. lactis
Show Answer
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Discuss
Correct Answer:
Saccharomyces diastaticus
6. Mined salt has been reported to contain about
Options
A. 50% Micrococcus, 10% Coryneforms and 14% Bacillus
B. 60% Micrococcus, 20% Coryneforms and 14% Bacillus
C. 70% Micrococcus, 20% Coryneforms and 4% Bacillus
D. 70% Micrococcus, 20% Coryneforms and 10% Bacillus
Show Answer
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Discuss
Correct Answer: 70% Micrococcus, 20% Coryneforms and 4% Bacillus
7. The manufacture of baker's yeast involve
Options
A.
S. cerevisiae
B.
S. thermophillus
C.
Bacillus subtilis
D. none of these
Show Answer
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Discuss
Correct Answer:
S. cerevisiae
8. The most commonly used medium for the build up of cultures and the production of baker's yeast consist of
Options
A. molasses and minerals
B. molasses, minerals and salts
C. molasses
D. molasses, lactose
Show Answer
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Discuss
Correct Answer: molasses, minerals and salts
9. Which of the following (s) is/are the major spoilage of soft drinks from the marked growth of yeasts and bacteria?
Options
A. Cloudiness and ropiness
B. Flat sour spoilage
C. Superficial fungal spoilage
D. Pin-spot molding
Show Answer
Scratch Pad
Discuss
Correct Answer: Cloudiness and ropiness
10. The most important organism involved in manufacture of Koji is
Options
A.
Aspergillus oryzae
B.
Aspergillus soyae
C. both (a) and (b)
D.
Lactobacillus lactis
Show Answer
Scratch Pad
Discuss
Correct Answer: both (a) and (b)
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Wine and Beer