Biochemistry Ch 4 Homework Review
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5 Terms
The chemical forces that contribute to the stability of the DNA due to the base stacking present in the DNA helix are:
a. hydrogen bonds.
b. van der Waals interactions.
c. hydrophobic interactions.
d. salt bridges.
e. charge repulsive forces.
b. van der Waals interactions.
Single-stranded nucleic acids can adopt complex structures through long-range interactions such as
a. Watson–Crick base pairing.
b. nonstandard hydrogen bonding.
c. hydrophobic effect.
d. hypochromic effect.
e. van der Waals interactions.
b. nonstandard hydrogen bonding.
What group (or atom) of the nucleotide base is esterified to a phosphate group to bind that nucleotide to the next one?
the 3
-hydroxyl -OH) group
the 5
-hydroxyl (5
-OH) group
N-1 in purines and N-9 in pyrimidines
N-9 in purines and N-1 in pyrimidines
none
What group (or atom) of the nucleotide base is esterified to a phosphate group to bind that nucleotide to the next one?
the 3
-hydroxyl (3
-OH) group
the 5
-hydroxyl (5
-OH) group
N-1 in purines and N-9 in pyrimidines
N-9 in purines and N-1 in pyrimidines
none
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