A ________ bond holds the amino acids of a growing polypeptide chain together during the elongation stage of translation.
A. hydrogen
B. peptide
C. glycosidic
D. noncovalent
E. lactose
B. peptide
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Carrier-mediated transport is also called
A. facilitated diffusion. B. active transport. C. exocytosis. D. endocytosis. E. phagocytosis.
Which mechanism of genetic transfer utilizes a sex pilus?
A. Transformation B. Transduction C. Conjugation D. All of the answers are correct
In a normal mammalian birth, how does the body guarantee that birth proceeds to completion?
A. Via positive feedback -- stretching of the uterus by the descending fetus induces release of oxytocin from the posterior pituitary causing even stronger uterine contractions. B. Via negative feedback -- stretching of the uterus by the descending fetus induces release of FSH and LH from the posterior pituitary causing even stronger uterine contractions. C. Via positive feedback -- stretching of the uterus by the descending fetus induces release of prolactin from the posterior pituitary causing even stronger uterine contractions. D. Via negative feedback -- stretching of the uterus by the descending fetus induces release of prostaglandins from the posterior pituitary causing weaker uterine contractions.
The first cells were probably
A. Eukaryotic. B. Archaea. C. Aerobic. D. Prokaryotic.