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Question

Which of these organisms is unicellular, causes fermentation of sugar solutions and respires anerobically?

A
Rhizopus
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B
Yeast
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C
Amoeba
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D
Bacteria
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Solution

The correct option is B Yeast
The yeast is a type of fungal species which have unicellular cells. These cells are known to perform anaerobic fermentation of the sugars and produce alcohol and carbon dioxide. The organism respires anaerobically and breaks down the fermentable sugars in the absence of oxygen.
Thus, the correct answer is option B.

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