Antibody proteins consist of two heavy and ____________________ light polypeptide chains
Fill in the blank(s) with correct word
two
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The toxin that causes botulism
A. promotes release of acetylcholine. B. prevents decomposition of acetylcholine. C. decomposes acetylcholine. D. prevents release of acetylcholine.
Which of the following is true with regard to homosexuality?
A. It is found in only certain societies. B. It is more frequent among males than among females. C. Outside the Western world, it tends to be the predominant form of sexual behavior for adults. D. Attitudes toward it vary little across cultures.
The two organ systems involved in providing oxygen to the body and removing carbon dioxide are the
A. cardiovascular and respiratory. B. reproductive and nervous. C. integumentary and muscular. D. respiratory and digestive.
Some simple columnar and pseudostratified columnar epithelia have ________ cells, which produce a protective mucous coating over the mucous membranes.
A. fibrous B. blood C. keratinized D. goblet E. basal