Biology 9700 · AS & A Level · Structure of nucleic acids and replication of DNA
Structure of nucleic acids and replication of DNA — practice question
Carbohydrates, proteins and nucleic acids are kinds of biological molecule. In each category, some molecules can be described as polymers.
(a)[4]
A polymer is a large molecule formed from smaller repeating molecules called monomers.
Complete Table 4.1 to give a summary of some named biological polymers.
(b)[2]
Explain why an amylose molecule and a cellulose molecule have very different structures, despite both using glucose as the monomer.
(c)[5]
DNA nucleotides are polymerised during the semi-conservative replication of a DNA molecule in interphase.
Describe the semi-conservative replication of DNA.
Worked solution & mark scheme
This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Amylose is a polymer made from glucose units linked by glycosidic bonds” …