Question

question 40
the bubbles in beer are _.
o a. nitrous oxide
b.carbon dioxide
o c. pyruvate
d.oxygen
e. ethanol

Explanation:

Beer is produced through fermentation. During fermentation, yeast converts sugars into ethanol and carbon dioxide. The carbon dioxide gas forms bubbles in the beer. Nitrous oxide is not a by - product of beer fermentation. Pyruvate is an intermediate in cellular respiration and not a gas in beer. Oxygen is not the gas that forms bubbles in beer as it is not a major product of the fermentation process in the context of beer production. Ethanol is a liquid (the alcohol in beer) and not a gas that forms bubbles.

Answer:

B. carbon dioxide