Explain how mature, naive B cells co-express IgM and IgD
What will be an ideal response?
Naive B cells express IgM and IgD simultaneously through a mechanism involving alternative ways of processing the RNA transcript before translation. A primary transcript containing leader (L), V, D, J, C?, and C? is produced first. This transcript contains two distinct polyadenylation signal sequences, one following the C? exons (pA1) and the other following the C? exons (pA2). Processing results in the removal of either C? or C? exons (plus introns) through alternative splicing. The resulting mRNAs, which encode either C? or C?, are polyadenylated at the pA1 or pA2 site, respectively.
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Keisha Brown receives an annual salary of $30,900 as an Italian language teacher. How much does Keisha receive each month?
A) $3348 B) $3090 C) $3883 D) $2575 E) $3605
A patient's age and weight are sometimes (but not always) included on a prescription form. Explain why this information might be useful to include
What will be an ideal response?
The term _____ is used to describe polymorphic antigens that vary between individuals of the same species
a. xenoantigens b. immunoantigens c. alloantigens d. histoantigens e. autoantigens.
The prefixes hemi- and semi- each mean "half."?
Indicate whether the statement is true or false