1 In some individuals, the immune system attacks substances such as grass pollen that are usually harmless, resulting in

(1) an allergic reaction
(2) a form of cancer
(3) an insulin imbalance
(4) a mutation 

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2 A characteristic shared by all enzymes, hormones, and antibodies is that their function is determined by the

(1) shape of their molecules
(2) DNA they contain
(3) inorganic molecules they contain
(4) organelles present in their structure

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3 If a human system fails to function properly, what is the most likely result?

(1) a stable rate of metabolism
(2) a disturbance in homeostasis
(3) a change in the method of cellular respiration
(4) a change in the function of DNA

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4 The shape of a protein molecule is influenced by

(1) whether it is organic or inorganic
(2) the sequence of amino acids in it
(3) the number of genes found in the nucleus
(4) the number of chromosomes in the cell

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5 The diagram below illustrates a biochemical process that occurs in organisms.

The substance labeled “catalyst” is also known as

(1) a hormone         (3) an antibody
(2) an enzyme        (4) an inorganic compound

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