Answer questions 62–66 in reference to the five nucleotides
listed below:a.
guanine
b. cytosine
c. pyrimidine
d. thymine
e. uracil
M 62. Erwin Chargaff’s data indicates that within a species
the amount of adenine is always equal to the amount
of this.
E 63. This nucleotide is not incorporated into the structure
of the DNA helix.
D 64. This nucleotide is a double-ring molecule.
M 65. If one chain of a DNA molecule has a purine at a
given position, this complements it on the other
chain.
D 66. Two hydrogen bonds connect adenine to
__________ in the DNA molecule.
Answers: 62. d, 63. e, 64. a, 65. c, 66. d
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