Question

question 4 (10 points)
the process whereby some yeasts act on sugar in cereal grains, fruits, and so on, and recombine the carbon, hydrogen, and oxygen molecules of the sugar into ethyl alcohol and carbon dioxide is known as:
a) fermentation.
b) distillation.
c) ethylization.
d) recombination.
question 5 (10 points)
the proof number indicates what percentage alcohol by volume the drink contains and is ____________ the percentage alcohol by volume.
a) the same as

Explanation:

• Question 4: Fermentation is the biological process where yeast (a microorganism) breaks down sugar (such as glucose) in the absence of oxygen (anaerobic conditions) to produce ethyl alcohol (ethanol) and carbon dioxide. Distillation is a physical separation process based on differences in boiling points. Ethylization is not a standard term for this biological sugar - to - alcohol conversion. Recombination is a more general term for combining elements but not specific to this yeast - sugar - alcohol reaction.
• Question 5: The proof number of an alcoholic beverage is defined as twice the percentage of alcohol by volume. For example, if a drink is 40% alcohol by volume, its proof is \(40\times2 = 80\) proof.

Answer:

• Question 4: A. fermentation
• Question 5: (Assuming the correct option is “twice” which is not shown in the provided options for question 5. But if we go by the relation proof \(P = 2\times\) (alcohol by volume \(V\)), and if we assume there was a typo and the intended option was “twice” instead of the given ones, we can say that the proof number is twice the percentage alcohol by volume)