Biology Chapter 43 Clickers

All antibodies in a single individual are similar in that they: A. all contain the same C segment but different V segments. B. all contain the same C segments on their heavy and light chains. C. all contain the same V segments on their heavy and light chains. D. all contain the same C segments on their heavy chains, but different C segments on their light chains. E. None of the other answer options is correct.

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Antigens are ________________, whereas antibodies are _______. A. present on the foreign molecule; selected and produced in high quantities in response to a specific foreign molecule B. produced in response to a foreign molecule; the functional component of the immune system C. present on the foreign molecule; also present on a foreign molecule D. present on the foreign molecule; always present and ready to respond to a specific foreign molecule

A. present on the foreign molecule; selected and produced in high quantities in response to a specific foreign molecule

Innate immunity activation depends on: A. previous exposure to a foreign antigen. B. diversity of antibodies in the blood stream. C. MHC class II proteins. D. memory B cells. E. None of the other answer options is correct.

B. diversity of antibodies in the blood stream.

Virus-infected cells are detected and destroyed by which cell-mediated immune response? A. B cells B. helper T cells C. cytotoxic T cells D. macrophages

C. cytotoxic T cells

Skin is an important part of the immune response because: A. it is relatively porous. B. the presence of white blood cells on the surface provides protection to the host. C. it acts as a barrier to keep out pathogens. D. bacteria on the surface kill viruses that touch the skin.

C. it acts as a barrier to keep out pathogens.

Which of the following is required to activate a helper T cell, which in turn can stimulate antibody production by B cells? A. an antigen B. an antibody C. a major histocompatibility complex D. an antibody and a major histocompatibility complex protein E. an antigen and a major histocompatibility complex protein

E. an antigen and a major histocompatibility complex protein