It is utilized in the production of wine and beer.
Explanation
Yeast (specifically Saccharomyces cerevisiae) is a unicellular eukaryotic fungus. It is metabolically versatile and is widely used in biotechnology and industrial processes due to its ability to ferment sugars.
Statement-wise Analysis
- Statement It is a multicellular organism found in soil. is Incorrect. Yeast is a unicellular fungus. While most fungi are multicellular and filamentous, yeast exists as single cells.
- Statement It produces water as the primary product of anaerobic respiration. is Incorrect. In anaerobic respiration (fermentation), yeast partially breaks down glucose to produce ethanol and carbon dioxide. Water is a primary end product of aerobic respiration, not anaerobic respiration.
- Statement It is utilized in the production of wine and beer. is Correct. Yeast is extensively utilized in the beverage industry. It ferments sugars found in malted cereals and fruit juices to produce ethanol, forming the basis for brewing beer and making wine.
- Statement It is an obligate aerobe that cannot survive without oxygen. is Incorrect. Yeast is a facultative anaerobe, not an obligate aerobe. This means it can survive and generate energy both in the presence of oxygen (aerobic respiration) and in the absence of oxygen (fermentation).
Key Takeaway
Yeast is a unicellular, facultative anaerobe that performs alcoholic fermentation, converting sugars into ethanol and carbon dioxide, which is essential for the brewing and baking industries.