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Anatomy & Physiology

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Set 7 Cellular Respiration Harvesting Energy From Carbohydrates And Other Fuel Molecules

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Question 1

(Multiple Choice)

Free
When carbohydrates are oxidized, the C-H bonds of the carbohydrate become C=O bonds of carbon dioxide. Oxidation is defined as a loss of electrons, but carbon does not become positively charged in the process. Why then is this considered oxidation?

A)The shared electrons in C-O bonds spend less time close to the carbon nucleus than the shared electrons in C-H bonds.
B)Electrons in the C=O bonds are higher energy than the electrons in the C-H bonds.
C)C=O bonds in CO2 are double bonds, and C-H bonds are single bonds.
D)The phosphate groups of ATP are ionized, and carbons donate those electrons.

Answer

Question 2

(Multiple Choice)

Free
Why do marathon runners "carbo load" (that is, eat a lot of pasta) before a big race?

A)They will feel full longer.
B)The bonds in carbohydrates have high potential energy.
C)The bonds in carbohydrates have low potential energy and can thus be broken down and readily consumed.
D)Through the process of anabolism, the athlete will break down the carbohydrates into smaller components, including ATP.

Answer

Question 3

(Multiple Choice)

Free
Which one of the following represents the REDUCED forms of the two major electron carriers?

A)NAD+ and FAD
B)NAD+ and FADH2
C)NADH and FAD
D)NADH and FADH2

Answer