24. Metabolism and Nutrition

Cellular Respiration: Redox Reactions

Multiple Choice
Which of the following substances is considered a provitamin?
Open Question
Certain diet plans claim that a person may eat all the protein he or she wants, as protein is not stored by the body. Is this claim completely accurate? Explain.
Multiple Choice
An electron carrier before it harvests energy from glucose molecules in a series of gradual steps is:
a) Pyruvate.
b) AMP.
c) ATP.
d) NAD⁺.
e) NADH.
Open Question
Which of the following statements is false?

a. Fiber is a polysaccharide that is completely or partially indigestible by the human body.
b. A complete protein contains all the essential amino acids.
c. Saturated fats contain hydrogen atoms arranged on opposite sides of the carbon-carbon double bond.
d. Linoleic and linolenic acid are essential fatty acids.
Open Question
Amino acids are essential (and important) to the body for all the following excepta. production of some hormones,b. production of antibodies,c. formation of most structural materials,d. as a source of quick energy.
Open Question
List some factors that influence plasma cholesterol levels. Also list the sources and fates of cholesterol in the body.
Multiple Choice
Most vitamins __________.
Open Question
How do fat-soluble and water-soluble vitamins differ? Which vitamins are fat-soluble?
Multiple Choice
One function of vitamin A is to __________.
Multiple Choice
When glucose donates electrons to NAD⁺ creating NADH, the glucose molecule becomes:
a) Hydrolyzed.
b) Oxidized.
c) Neutral.
d) Reduced.
Multiple Choice
Which element below is considered a trace mineral?