Which of the following amino acids has a nonpolar thioether R group?
A. cysteine
B. serine
C. tryptophan
D. methionine
E. None of the choices given is correct.
D
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In the TCA cycle, two carbons are removed from citric acid in the form of ________, thereby regenerating oxaloacetate to complete the cycle.
A. acetyl-CoA B. methanol C. carbon dioxide D. ethanol
The beautiful fall leaves get their orange and yellow colors from carotenoids
a. True b. False
While examining her patient's nose, Dr. Carlita Gonzales, an allergy specialist, noted a hole in the partition between the nasal cavities. The doctor suspects her patient is snorting which drug?
A) alcohol B) marijuana C) mescaline D) cocaine
Which of the following is not a part & nbsp;of a developing eudicot embryo?
Select one: a. epicotyl b. hypocotyl c. cotyledon d. radicle e. coleoptile