Which vitamin functions in forming blood
clots?
a. A
b. E
c. K
d. B
e. none of these
C
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What occurs in a missense mutation? a. All of the amino acids beyond the mutation point are changed. b. A nucleotide is added to the DNA
c. A nucleotide is deleted from the DNA. d. A single amino acid is substituted for another in a protein. e. The protein is always completely nonfunctional.
The position of a specific gene on a chromosome can be determined by:
a. preparing a karyotype. b. southern blotting. c. genomic hybridization. d. chromosome sorting. e. fluorescent in situ hybridization.
A molecule that closely resembles the shape of a substrate for an enzyme and that decreases the activity of the enzyme would most likely serve as a(n)
A. noncompetitive inhibitor. B. allosteric inhibitor. C. allosteric activator. D. competitive inhibitor.
The location of the heart's pacemaker is a specialized region of cardiac muscle called the
A) atrioventricular node. B) sinoatrial node. C) right atrium. D) left ventricle.