A. Are protein molecules. B. Are absent from the blood in early fetal life.

Question

Antibodies

A. Are protein molecules.

B. Are absent from the blood in early fetal life.

C. Are produced at a greater rate after a first, than after a second, exposure to an antigen six weeks later.

D. Circulating as free immunoglobulins are produced by B lymphocytes.

E. With a 1 in 8 titre are more concentrated than ones with a 1 in 4 titre.

Answer 1

A. True They are made by ribosomes in plasma cells.

B. True Immunological tolerance prevents the fetus forming antibodies to its own proteins.

C. False The response to the second exposure is greater since the immune system has been sensitized by the first exposure.

D. True T lymphocytes are responsible for cell-mediated immunity.

E. True Antibody with a 1 in 8 titre is detected at greater dilution than one with a 1 in 4 titre.