Biology 9700 · AS & A Level · Structure of nucleic acids and replication of DNA
Structure of nucleic acids and replication of DNA — practice question
Fig. 4.1 presents a phosphorylated nucleotide, which is one of the monomers used to synthesise DNA during replication. Fig. 4.2 presents a short section of a DNA molecule, and one strand of that molecule is labelled Y.
(a(i))[1]
State what is meant by DNA monomers.
(a(ii))[1]
State how the structure of ATP differs from that of the phosphorylated nucleotide shown in Fig. 4.1.
(a(iii))[1]
State the process in all cells that produces ATP.
(b(i))[2]
Complete Fig. 4.2 by drawing dotted lines to show all the hydrogen bonds linking the two strands of the DNA molecule.
(b(ii))[1]
State the name of bond X.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Repeating units / sub-units / molecules / nucleotides that join to form a polymer / polynucleotide / DNA strand” …