Each amino acid differs from another in the
A) number of central carbon atoms.
B) size of the amino group.
C) number of carboxyl groups.
D) nature of the side chain.
E) number of peptide bonds in the molecule.
D
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Which of the following substances is absorbed by the large intestine?
a. salts b. vitamin K c. water d. all of the above
A functional group is best described as reoccurring clusters of
A) elements that occur in a salt. B) atoms that greatly influence the chemical properties of molecules they are part of. C) atoms that function in the body. D) elements that form at high pH. E) amino acids in a globular protein.
The respiratory centers of the brainstem lie within the:
A) basal ganglia. B) pons and medulla. C) diencephalon. D) midbrain.
The azygos vein drains blood from the ________ into the superior vena cava.
A. kidneys B. thorax C. abdominal wall D. head E. upper arm