Which of the following products of beer making and winemaking result in off-flavors?

Question

Quizplus · Accepted Answer

Diacetyl is a byproduct of beer and wine fermentation that can result in buttery or butterscotch off-flavors if present in high concentrations. Ethanol is the main product of fermentation and is not usually considered an off-flavor. Esters and long-chain alcohols can contribute to the flavor profile of beer and wine when present in appropriate amounts, but can result in off-flavors if present in excess. Amino acids are not directly involved in the final flavor of beer or wine, but can contribute to the formation of off-flavors if they are metabolized by bacteria or yeast during the fermentation process.

Which of the Following Products of Beer Making and Winemaking