A Group of Molecular Biologists Is Trying to Synthesize a New

question 15

Multiple Choice

A group of molecular biologists is trying to synthesize a new artificial compound to mimic the effects of a known hormone that influences sexual behavior. The biologists have turned to you for advice. Which of the following compounds is most likely to mimic the effects of the hormone?

• A) a compound with the same number of carbon atoms as the hormone
• B) a compound with the same molecular mass (measured in daltons) as the hormone
• C) a compound with the same three-dimensional shape as part of the hormone
• D) a compound with the same number of valence electrons as the hormone
• E) a compound with the same number of hydrogen and nitrogen atoms as the hormone

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Definitions:

CD4 Glycoprotein

A protein on the surface of immune cells, such as T helper cells, that is involved in initiating the immune response.

Cytotoxic T

A type of lymphocyte (T cell) that kills cancer cells, cells that are infected (particularly with viruses), or cells that are damaged in other ways.

Intracellular Microorganisms

Microorganisms that live within the cells of a host, often causing disease or infection.

Cell-Mediated

Referring to immune responses that do not involve antibodies but rather the activation of phagocytes and antigen-specific cytotoxic T-lymphocytes.