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Question

In Bigo’s distillery the good fermentation vessels contained (i)_____ and bad fermentation vessels had (ii)_______.

A
(i) grey blobs of cells (ii) green dots of oscillating rods
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B
(i) green dots of oscillating rods (ii) grey blobs of cells
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C
(i) yellow blobs of cells (ii) grey dots of oscillating rods
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D
(i) grey dots of oscillating rods (ii) yellow blobs of cells
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Solution

The correct option is C (i) yellow blobs of cells (ii) grey dots of oscillating rods
In Bigo’s distillery the good fermentation vessels contained yellow blobs of cells and bad or the contaminated fermentation vessels contained grey dots of oscillating rods. Louis Pasteur observed that the yellow blobs of cells were responsible for producing alcohol, while the grey dots of oscillating rods in bad fermentation vessels produced acid. Later it was discovered that the yellow blobs were yeast which were responsible for alcohol production, while the grey dots were bacteria that produced the foul smelling acid.

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