What kind of molecule is an acetylcholine receptor?
A) nucleic acid
B) protein
C) carbohydrate
D) lipid
Answer: B) protein
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An exocrine gland has two parts,
A. a duct and a secretory portion. B. a basement membrane and a goblet cell. C. a brush border and a glandular portion. D. an acinus and a brush border. E. a duct and a basement membrane.
Which of these is not a component of saliva?
A) lysozyme B) metabolic waste C) defensins D) a cyanide derivative
Which is not one of the extraembryonic membranes that form early in the development of the embryo?
A. Placenta B. Chorion C. Amnion D. Yolk sac E. All of these are correct.
The tails of a phospholipid molecule in a plasma membrane are
A) hydrophilic. B) composed of amino acids. C) hydrophobic. D) facing the cytosol. E) interlocked to provide membrane strength.