DNA Structure and Replication
In a typical electrophoresis experiment, larger fragments of DNA move more

slowly, so they appear nearer the top of a gel photograph
slowly, so they appear nearer the bottom of a gel photograph
quickly, so they appear nearer the top of a gel photograph
quickly, so they appear nearer the bottom of a gel photograph

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DNA Structure and Replication
In DNA, there are

three bases known as adenine, guanine and cytosine
four bases known as adenine, guanine, thymine and cytosine
only two bases known as adenine and cytosine
five bases known as adenine, guanine, thymine, tryptophan and cytosine

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DNA Structure and Replication
The B-DNA structure found in solution is a

left-handed double helix of antiparallel chains (10 bp/turn)
left-handed zig-zag helix of antiparallel chains (10 bp/turn)
right-handed double helix of antiparallel chains (∼10 bp/turn)
right-handed double helix of parallel chains (∼10 bp/turn)

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