Answer:
A mutation in yeast makes it unable to convert pyruvate to ethanol. How will this mutation affect these yeast cells? The mutant yeast cells will be unable to grow anaerobically.
Step-by-step explanation:
The alcoholic fermentation can be described as a kind of anaerobic respiration in which yeast cells convert pyruvate into ethanol. Carbon dioxide is also released during this kind of fermentation.
Pyruvate decarboxylase is the enzyme which acts as a catalyst for this reaction. Hence, if a mutation occurs in yeast cells which makes it unable to convert pyruvate into ethanol, then the yeast will not be able to respire anaerobically.