The purine bases in nucleic acids include
A) thymine and cytosine.
B) guanine and adenine.
C) cytosine and guanine.
D) adenine and thymine.
E) ribose and deoxyribose.
Correct Answer:
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Q16: Two or more atoms bonded together are
Q17: The building blocks of an enzyme are
A)nucleotides.
B)glycerol
Q18: Polar molecules are composed of covalently-bonded
A)identical atoms.
B)carbon
Q19: Reactions involving electron removal are called _
Q20: The electrons of an atom are
A)always equal
Q22: Which of the following would have glycosidic
Q23: Which of the following represents an exchange
Q24: All of the following are polysaccharides, except
A)dextran
Q25: Which amino acid contains sulfur atoms that
Q26: ATP is best described as
A)an enzyme.
B)a double
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