Which of the following enables almost all cells of the body to be recognized by an individual's immune system as "self"?
A. The presence of class I MHC molecules on cell surfaces
B. The presence of class II MHC molecules on cell surfaces
C. The presence of ABO antigenic markers on cell surfaces
D. The presence of Ig D molecules on cell surfaces
Answer: A
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Assemblies of macromolecules are referred to as ________ complexes.
A. metamolecular B. ultramolecular C. supramolecular D. maximolecular
Based on genetic comparisons,
a. people of different races often have more genetic similarities than many individuals within a race. b. humans have a more ancient origin than chimpanzees. c. there is much genetic diversity among cheetahs. d. among humans, many genetic variations are restricted to certain racial groups. e. there is no difference between different races of humans.
Referring to the above diagram of the brain, A
identifies which lobe of the cerebrum?
a. frontal lobe b. parietal lobe c. occipital lobe d. temporal lobe e. primary motor cortex
The ratio of different-colored fluorescent dyes in microarray can be used to infer information about:a
patterns of gene expression only. b. drug activity only. c. the identity of disease-causing genes only. d. patterns of gene expression and also drug activity only. e. patterns of gene expression, drug activity, and the identity of disease-causing genes.