Which of the following is incorrect about transfer RNA?
A. It has an anticodon that is complementary to a codon.
B. It has a bottom hairpin loop with an anticodon.
C. The initiator tRNA that binds to the P site has the anticodon UAC.
D. The initiator tRNA in bacteria carries tryptophan.
E. It contains a binding site for an amino acid.
Answer: D
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The pH of the stomach is about ________
a. 7 b. 2 c. 11 d. 5
Which of the following occurs during human inhalation?
a. The diaphragm contracts and the external intercostal muscles relax. b. The diaphragm relaxes and the external intercostal muscles contract. c. The diaphragm contracts and the external intercostal muscles contract. d. The diaphragm relaxes and the external intercostal muscles relax. e. The diaphragm expands and increases oxygen uptake.
The major function of interferon-gamma is to
A. Induce the activation of resident macrophages B. Inhibit migration of macrophages from reaction sites C. Promote and maintain the proliferation of T cells D. Promote B and T cell growth