You Have Decided to Try to Make Your Own Wine

question 13

Multiple Choice

You have decided to try to make your own wine by adding yeast to a sweet grape juice. After allowing plenty of time for the yeast to grow, you find that although the sugar levels in the juice are decreased, there is no alcohol in the mixture. What could have been the reason fermentation did not occur?

• A) More sugar needs to be added. Yeast needs a lot of energy before it produces alcohol.
• B) Less sugar is needed in the juice. High sugar concentration causes cellular respiration to occur instead of fermentation.
• C) Yeast cannot ferment grapes, only bacteria can.
• D) The mixture needs less oxygen. Yeast only produces alcohol in the absence of oxygen.
• E) The mixture needs more carbon dioxide.

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Definitions:

Deviations

The differences between observed values and the average of those values within a dataset.

Mean

The arithmetic average of a set of numbers, calculated as the sum of all values divided by the count of values.

Sample Variance

A measure of the dispersion or variability of a sample dataset, representing how much the data points differ from the sample mean.

Mound-Shaped

Description of a symmetric, bell-shaped distribution, often associated with the normal distribution.