The pancreas secretes digestive enzymes into the ____
a. blood
b. gallbladder
c. liver
d. duodenum
e. stomach
ANSWER: d
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Which one of the following statements about the incorporation of selenocysteine into proteins is true?
A. Selenocysteine is an example of a posttranslational modification. B. The tRNA used to translate selenocysteine at a stop codon is first charged with serine. C. The tRNA used to translate selenocysteine at a stop codon has an anticodon sequence of UGA. D. The serine bound to the tRNA used to translate selenocysteine at a stop codon is converted to selenocysteine by the enzyme SelB.
In animals, the evolutionary development of cephalization is most associated with ____
a. bilateral symmetry b. radial symmetry c. ganglia d. nerve nets e. nerves
Conscious thought is associated with which one of the following?
A) cerebellum B) cerebral cortex C) medulla oblongata D) hypothalamus E) thalamus
A hydroxide ion has an oxygen atom
A. only. B. and an extra electron. C. and a hydrogen atom, and an extra electron. D. and a hydrogen atom, and an extra proton.