Biological molecules

Cards (12)

  • What are monomers?

    a small repeating unit that makes up polymers
  • what are 2 differences between cellulose and glycogen molecules?

    1. cellulose is made of b glucose whereas glycogen is made of a glucose.
    2. cellulose is straight chained whereas glycogen is branched.
  • What makes starch a good storage molecule?

    insoluble - doesn’t affect water potential
    branched - makes molecule compact
  • test for starch?

    iodine / potassium iodide test
  • components of triglycerides?

    glycerol, fatty acids
  • type of bond between fatty acids and glycerol?
    ester bond
  • What test is for lipids?
    ethanol test
    1. Shake sample with ethanol then water.
    2. If solution is milky lipids are present.
  • Describe how a peptide bond is formed between 2 amino acids to form a di peptide.

    A condensation reaction occurs
    The reaction occurs between amine and carboxyl group
  • Describe how the structure of a polypeptide is produced by bonds between amino acids.

    Hydrogen bonds form beta pleated sheets or alpha helixes
  • Two proteins have the same number and type of amino acids but different tertiary structures
    explain why.
    they have a different primary structure
    they form disulfide bridges in different places
  • Describe how the formation of a enzyme substrate complex increases rate of reaction.

    Reduced activation energy due to bonds bending
  • other than being disaccharides what is a similarity and difference between lactulose and lactose?

    they both contain a glycosidic bond
    lactulose contains galactose and lactose contains glucose