Sulfonamides inhibit the production of folic acid and, therefore, inhibit the synthesis of ________.
A. aromatic amino acids
B. ribose
C. purines and pyrimidines
D. peptidoglycan
Answer: C
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An allosteric inhibitor
A) increases the rate of substrate binding. B) binds and activates the high-affinity state of the enzymes. C) is identical to the active site. D) binds at the regulatory site. E) is converted to an activator by the enzyme.
During the first day or so after birth, the breasts produce a watery milk called
A) prostaglandins. B) amniotic fluid. C) lactose. D) colostrum. E) allantois.
One method used to prevent disulfide bond interference with protein sequencing procedures is:
A) cleaving proteins with proteases that specifically recognize disulfide bonds. B) protecting the disulfide bridge against spontaneous reduction to cysteinyl sulfhydryl groups. C) reducing disulfide bridges and preventing their re-formation by further modifying the —SH groups. D) removing cystines from protein sequences by proteolytic cleavage. E) sequencing proteins that do not contain cysteinyl residues.
Apes and humans together make up a group called
A. hominoids. B. prosimians. C. habilis. D. hominids. E. Homo sapiens.