Which of the following characteristics is common to both T-cell receptors and immunoglobulins?
a. Somatic recombination of V, D, and J segments is responsible for the diversity of antigen-binding sites.
b. Somatic hypermutation changes the affinity of antigen-binding sites and contributes to further diversification.
c. Class switching enables a change in effector function.
d. The antigen receptor is composed of two identical heavy chains and two identical light chains.
e. Carbohydrate, lipid, and protein antigens are recognized and stimulate a response.
A
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A. supine B. prone C. dorsum D. plantar
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A) young-old B) middle-old C) old-old D) semi-retired old
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a. True b. False Indicate whether the statement is true or false