The secondary immune response ____

a. is slower and weaker than the primary response
b. is dependent upon effector cells
c. is dependent upon memory cells
d. responds only one time to an antigen challenge
e. is a major component of the innate immune response


ANSWER: c

Biology & Microbiology

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Fill in the blank(s) with the appropriate word(s).

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The slow block to polyspermy occurs when polar bodies discharge their contents, thereby altering the

egg coats.

Indicate whether the statement is true or false.

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Regulatory proteins:a

defend against foreign invaders. b. store nutrients. c. catalyze a specific chemical reaction. d. control the expression of specific genes. e. strengthen and protect cells and tissues.

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Refer to Table 8.2. What is the sequence of amino acids encoded by the following sequence of bases in a strand of DNA?

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Biology & Microbiology