All of the following statements regarding proteins are true EXCEPT
A) they are the primary components of muscle, connective tissue, nails, and hair.
B) humans can synthesize all of the amino acids needed to make proteins.
C) most enzymes are proteins.
D) kwashiorkor is caused by protein deficiency.
E) some act as receptors on cell membranes.
B
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Predict what you would see if you were looking at a new species of Zygomycetes
A) a zygote enclosed in a tough outer coat B) flagellated spores C) susceptibility to fungicide D) multicellularity E) its ability to form an association with plant roots
What level of protein structure, characterized by coils and folds, results from hydrogen bonding between carboxyl and amino groups of the polypeptide chain?
A. primary B. secondary C. tertiary D. quaternary E. both secondary and quaternary
Semen components are produced by
a. the prostate gland. b. the seminal vesicles. c. the testes. d. the urinary bladder. e. all except "the urinary bladder."
The class of neurotransmitters that most commonly acts as a modulator of postsynaptic cell response are the
A. gases such as nitric oxide. B. acetylcholine. C. neuropeptides. D. amino acids. E. biogenic amines.