Of the twenty amino acids available for protein synthesis, how many must be obtained by dietary means?
a. 0
b. 2
c. 4
d. 8
e. 10
ANSWER: d
Biology & Microbiology
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Ecologists have documented the extinction over the last 20 years of ________ of the 110 species of harlequin frogs (Atelopus) native to tropical America.
A. 67% B. 100% C. 15% D. None of the choices are correct.
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__________ assorts gene pairs of homologous chromosomes independently of gene pairs on all other
chromosomes. Fill in the blank(s) with the appropriate word(s).
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__________ is the key hormone regulator of the postabsorptive state.
a. Glucagon b. Parathyroid hormone c. Cortisol d. Insulin
Biology & Microbiology