If a pharmaceutical company wished to design a drug to maintain low blood sugar levels, one approach might be to design a compound _____
A) that activates epinephrine receptors
B) that increases cAMP production in liver cells
C) to block G protein activity in liver cells
D) that increases phosphorylase activity
C
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Because more than one codon can specify the same amino acid, the genetic code is said to be
A. repetitive. B. redundant. C. reverse. D. degenerate. E. degrading.
If a codon for alanine is GCA, then the anticodon is ________.
A. CGU B. UGC C. GCA D. ACG E. CGT
Which of the following is characteristic of cardiac and smooth muscle, but not skeletal muscle?
a. located in the wall of the heart b. voluntary contraction c. presence of actin and myosin in muscle cells d. striated appearance e. none of these
Jan van Helmont concluded that plants gain most of their mass from
a) water. b) the soil. c) carbon dioxide in the air. d) oxygen in the air.