How does the DNA in a pre-B cell differ from germline DNA?
A) The V, D, and J genes have been successfully rearranged on the chromosome coding for
the heavy immunoglobulin chain.
B) The V, D, and J genes have been successfully rearranged on the chromosome coding for
both the heavy and light immunoglobulin chains.
C) The V, D, and J genes have been successfully rearranged on the chromosome coding for
the light immunoglobulin chain.
D) There is no difference in the DNA of these two cells.
A
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If the lower motor neurons to a muscle are destroyed, which of the following signs affects the denervated muscles?
A. Loss of reflexes B. Atrophy C. Muscle hyperstiffness D. Both A and B E. A, B, and C
If viewing the three-dimensional structure of a T-cell receptor from the side, with the T-cell membrane at the bottom and the receptor pointing upwards, which of the following is inconsistent with experimental data?
a. The highly variable CDR loops are located across the top surface. b. The membrane-proximal domains consist of C? and C?. c. The portion that makes physical contact with the ligand comprises V? and C?, the domains farthest from the T-cell membrane. d. The transmembrane regions span the plasma membrane of the T cell. e. The cytoplasmic tails of the T-cell receptor ? and ? chains are very short.
Energy expended doing everyday activities other than exercise is referred to as ____
a. basal metabolic rate b. nonexercise activity thermogenesis c. physical activity d. low-intensity aerobic physical activity e. physical fitness
Ms. Vasco's arms are covered with bruises and as a result, she begs you to give her a pill rather than another injection. Under what circumstances can a route be changed?
A) when the patient approved the change B) only with a physician's order C) when the ordered form is not available D) anytime that an equivalent is available