The immunological consequence of severe combined immunodeficiency disease (SCID) caused by a genetic defect in either RAG-1 or RAG-2 genes is:

A genetic defect in the λ5 gene would cause which of the following consequences? (select all that apply)

Which of the following statements regarding T-cell receptor recognition of antigen is correct?

What is the fate of an immature B cell that encounters and has specificity for self antigen?

In terms of V, D, and J segment arrangement, the T-cell receptor α-chain locus resembles the immunoglobulin locus, whereas the T-cell receptor β-chain locus resembles the immunoglobulin locus.

In the scientific method, what precedes the formation of the hypothesis?

In a water molecule,

What are the basic structures that make up a nucleotide?

Single-celled prokaryotes

Research indicates that ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules that