The fibrous protein found in muscles is:
a. collagen.
b. myosin.
c. hemoglobin.
d. albumin.
Ans: b. myosin.
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A scientist has discovered a new molecular compound that is a long chain of 26 carbons bonded together, with a methyl group on one end and an acid group on the other end of the molecule. The compound does not contain any nitrogen or sulfur atoms. Based on this information, the compound is a(an) ________.
A. amino acid B. fatty acid C. sterol D. phospholipid
Water is polar because:
a. it is an ion b. the electrons are equally shared among the O and H atoms c. the electrons spend more time around the O atom than the H atoms d. the electrons spend more time around the H atoms than the O atom
Which nonprofit organization sets reliability and purity standards for dietary supplements?
a. U.S. Pharmacopeia b. Dietary Guidelines for Americans c. FDA d. USDA
The lower esophageal sphincter is also known as the
a. reflux restrainer. b. cardiac sphincter. c. perihepatic control valve. d. reverse peristalsis inhibitor.