TCRs associate with the adapter molecule
A) CD3.
B) CD28.
C) Ig?.
D) Ig?.
Answer: A
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People homozygous for the sickle-cell anemia allele develop a life threatening disease, while those homozygous for the normal allele are at the highest risk of dying from malaria. Carriers have some resistance to malaria, but do not develop sickle cell anemia. This is an example of ____
A. founder effect. B. genetic bottleneck. C. heterozygosity. D. heterozygote advantage. E. point mutation.
Sites of transcription and therefore most of the genes along the length of the chromosome appear to be found in
A) heterochromatin. B) euchromatin. C) constitutive heterochromatin. D) centromeric regions.
The male part of a flower is the
a. carpel. b. stamen. c. petal. d. sepal. e. receptacle
Inflammation of the kidneys is called
1.nephritis. 2.glomerulonephritis. 3.pyelitis. 4.pyelonephritis. 5.cystitis.