DNA Structure

Test yourself on DNA Structure

• A strand of DNA has the base sequence A, T, G, C. Applying the base pairing rules, what sequence of bases is found at the same positions on the complementary strand?

• Which parts of a nucleotide join together to form the long strands of DNA, rather than pairing with the opposite strand?

• What type of large molecule is DNA?

• The two strands of a DNA molecule are held together by attractions between opposite bases. What would happen to the two strands if these attractions were broken?

• A section of a DNA molecule contains 50 base pairs, each made up of two bases joined across the two strands. How many individual bases are in this section of DNA?