A-LevelBiologyNucleic acids and protein synthesis9700/12 · May/June 2018 · Q231 Mark
A section of a DNA molecule has the coding sequence: AGGCAATGGC. Which statements are correct? 1 This coding sequence contains 3 pyrimidines. 2 The double-stranded DNA of this section contains 26 hydrogen bonds between complementary bases. 3 The double-stranded DNA of this section has 20 sugar-phosphate bonds.
A1, 2 and 3
B1 and 2 only
C1 and 3 only
D2 and 3 only
✓ Correct answer
B: 1 and 2 only
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