Four nucleic acid samples are analyzed to determine the percentages of the nucleotides they contain. Which of the following DNA sample(s) could be double-stranded DNA?
Sample 1: A(22%), G(28%), T(22%), U(0%), C(28%);
Sample 2: A(30%), G(30%), T(0%), U(20%), C(20%);
Sample 3: A(18%), G(32%), T(0%), U(18%), C(32%);
Sample 4: A(29%), G(29%), T(21%), U(0%), C(21%)
a. Sample 1
b. Samples 1 and 2
c. Samples 1 and 4
d. Samples 2 and 3
e. Samples 3 and 4
Answer: a. Sample 1
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