Which of the Following Statements About Ig Isotype Switching Is

question 3

Multiple Choice

Which of the following statements about Ig isotype switching is NOT true?

• A)Interleukin-4 promotes switching to the IgE isotype by increasing germline transcription of the C? exon.
• B)Isotype switching involves recombination of a V(D)J complex with downstream C region genes and the deletion of intervening DNA including other C region genes.
• C)Activation-induced deaminase (AID)is required for switch recombination.
• D)The enzymes that mediate isotype switching recognize conserved heptamer and nonamer DNA sequences adjacent to the constant region exons.
• E)The same recombined V(D)J gene complex is used to encode the antigen-binding region of the antibodies produced by a B cell before and after isotype switching.

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Definitions:

Consumer Surplus

The discrepancy in the total money consumers are willing to invest in a good or service compared to what they really pay.

Market Demand Curve

A graphical representation showing the relationship between the price of a good and the total quantity demanded by all consumers in the market.

Magazine Circulation

The total number of copies of a magazine that are distributed to subscribers and retailers within a specific period.

Consumer Surplus

The distinction between the aggregate amount consumers are inclined and capable of paying for a service or product and what they actually disburse.