The two-stage thymic selection process for selecting self-tolerant, antigen-reactive T cells results in
A) allelic exclusion.
B) clonal deletion.
C) complementarity-determining regions.
D) somatic hypermutation.
Answer: B
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Fill in the blank with the appropriate word.
____ behaviors are instinctive and carried out regardless of earlier experience
Fill in the blank with the appropriate word.
Usually, a(n) _____ inhibitor forms a covalent bond with an amino acid side group within the active site, which prevents the substrate from entering the active site or prevents catalytic activity.
Fill in the blank(s) with the appropriate word(s).
A somatic cell from a garden pea normally contains 14 chromosomes. How many sister chromatids would that cell contain during G1 of the cell cycle?
A. 7 B. 14 C. 0 D. 28