You Have Decided to Try to Make Your Own Wine

question 54

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 need a lot of energy before they produce alcohol.
• B) Less sugar is needed in the juice, high sugar concentration causes cellular respiration to occur instead of fermentation.
• C) Yeast can not ferment grapes, only bacteria can.
• D) The mixture needs less oxygen, yeast only produce alcohol in the absence of oxygen.
• E) The mixture needs more carbon dioxide.

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Definitions:

Creep

The slow movement of soil or rock down a slope, driven by gravity.

Slither

To move smoothly over a surface with a continuous gliding motion, often applied to the movement of snakes or similar creatures.

Elastic Material

Elastic material is a substance able to return to its original shape after being stretched or compressed, exemplified by rubber.

Stored Energy

Refers to potential energy that is held within an object or substance, awaiting release to perform work or generate force.