assessment questions

• what is a monomer

  a small molecule that when bonded with 2 or more other monomers create a polymer
• give one similarity and one difference between the structures of lactulose and lactose

  similarity- both have galactose, both have glycosidic acid

  difference- lactulose has fructose whereas lactose contains glucose
• give 2 features of dna and explain how each one is important in semi-conservative replication of dna

  • 2 strands mean each act as a template
  • complementary base pairing allows accurate replication
  • weak hydrogen bonds between bases allow 2 strands to seperate
• describe how a peptide bond is formed between 2 amino acids to form a dipeptide

  when two amino acids are linked together they use a condensation reaction between NH2 and COOH
• describe how the secondary structure of polypeptide is produced by bonds between amino acids


  • hydrogen bonds form in amino acid chain
  • makes in coil into alpha helix