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Which one of the following pairs is wrongly matched?
A
yeast - ethanol
B
streptomycetes - antibiotic
C
coliforms - vinegar
D
methanogens - gobar gas
Detailed Solution
Vinegar (acetic acid) is produced by the acetic acid bacterium Acetobacter aceti, which oxidises ethanol to acetic acid.
Coliforms such as Escherichia coli are bacteria that live in the intestine of man and other warm-blooded animals. Their presence in drinking water indicates faecal contamination; they are not used for making vinegar.
So the pair coliforms - vinegar is wrongly matched.
Yeast (Saccharomyces cerevisiae) ferments sugars to produce ethanol.
Streptomycetes (species of Streptomyces) produce antibiotics such as streptomycin.
Methanogens (for example Methanobacterium) produce methane during the anaerobic breakdown of cattle dung, giving gobar gas (biogas).
These three pairs are correctly matched.
Coliforms such as Escherichia coli are bacteria that live in the intestine of man and other warm-blooded animals. Their presence in drinking water indicates faecal contamination; they are not used for making vinegar.
So the pair coliforms - vinegar is wrongly matched.
Yeast (Saccharomyces cerevisiae) ferments sugars to produce ethanol.
Streptomycetes (species of Streptomyces) produce antibiotics such as streptomycin.
Methanogens (for example Methanobacterium) produce methane during the anaerobic breakdown of cattle dung, giving gobar gas (biogas).
These three pairs are correctly matched.