The Switch of One B Cell from Producing One Class

question 66

Multiple Choice

The switch of one B cell from producing one class of antibody to another class of antibody that is responsive to the same antigen is due to ________.

• A) the rearrangement of V region genes in that clone of responsive B cells
• B) a switch in the kind of antigen-presenting cell that is involved in the immune response
• C) a patient's reaction to the first kind of antibody made by the plasma cells
• D) the rearrangement of immunoglobulin heavy-chain C region DNA

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Definitions:

Planned Investment

Future directed expenditure by firms on physical assets like machinery and buildings, anticipated to enhance productivity.

Interest Rates

The cost of borrowing money or the return on savings, typically expressed as a percentage of the principal sum annually.

Money Supply

The sum of all financial resources circulating within an economy at a particular moment, encompassing cash, coins, and the amounts present in checking and savings accounts.

Recessionary Gap

The difference between the actual output of an economy and its potential output at full employment, during a recession.