What is a "limiting" amino acid in a protein?
a. A nonessential amino acid present in high amounts, which inhibits protein synthesis
b. An amino acid of the wrong structure to be utilized for protein synthesis efficiently
c. An essential amino acid present in insufficient quantity for body protein synthesis to take place
d. An amino acid that limits the absorption of other essential amino acids by competing with them for transport sites within the GI tract
e. An amino acid that has the paradoxical effect of causing catabolism
ANS: C
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Which type of water is drawn from an underground source and contains at least 250 parts per million of dissolved solids?
a. Well water b. Spring water c. Mineral water d. Distilled water
The label on a bag of salt-free pretzels indicates that they are "low-fat." This means the pretzels provide ________ gram(s) of fat or less per serving.
A. 5 B. 3 C. 7 D. 1
A person's "VO2 max" is the maximum
a. velocity on a treadmill test. b. rate of oxygen consumption. c. intake of oxygen while at rest. d. intake of air at 70% physical exhaustion. e. speed of oxygen exchange in the lungs
The primary role of most of the B-vitamins is to
A) maintain acid-base balance. B) directly provide the body with energy. C) act as coenzymes. D) maintain and repair body tissues.