Most broad-spectrum antibiotics act by
A. inhibiting the synthesis of the cell wall.
B. inhibiting protein synthesis.
C. inhibiting nucleic acid synthesis.
D. inhibiting metabolic pathways.
E. disrupting the cytoplasmic membrane.
Answer: B
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A gene created from the fusion of two gene fragments is considered a
A. tumor-suppressor gene. B. proto-oncogene. C. structural gene. D. regulatory gene. E. chimeric gene.
Which process does not aid expulsion of an infant by contractions during labor?
A) oxytocin produced by the mother B) increased number of hormone receptors on uterine cells C) oxytocin produced by the fetus D) HCG produced by the mother
Which pigments reflect red, orange, and yellow light?
a. chlorophyll a b. phycocyanobilin c. phycoviolobilin d. carotenoids e. anthocyanin
Which of these does cellular respiration do?
A. releases energy and reduces water B. oxidizes glucose and reduces oxygen C. oxidizes oxygen and reduces glucose D. releases energy and oxygen E. requires energy and releases NADH