_________ is a microorganism which is unicellular, eukaryotic, with a chitinous cell wall and is used in the production of wine.
A
Pseudomonas
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B
Clostridium
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C
Yeast
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D
Penicillium
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Solution
The correct option is C Yeast Yeast and penicillium are both fungi whereas pseudomonas and clostridium are bacteria. Chitinous cell wall is a characteristic feature of fungi and it is found in both yeast and penicillium. Bacterial cell walls are made of peptidoglycan. Based on cellular complexity, bacteria are categorised as prokaryotic while fungi are categorised as eukaryotic. Yeast is an unicellular fungi while penicillium is a multicellular fungi. Pseudomonas and clostridium are both unicellular in nature. Also, yeasts have two main uses in food production, baking and making alcoholic beverages. With respect to the above mentioned characteristics, yeast is the only microorganism that fits the description.