Biological molecules

• Which 3 elements are carbohydrates made from ?

  Carbon , oxygen , hydrogen
• What is the structure of a lipid ?

  A single glycerol molecule attached to three fatty acid molecules
• Use the terms monomer and polymer to explain the difference between simple sugars and complex carbohydrates

  • Complex carbohydrates are large molecule, made up of lots of individual smaller molecules called simple sugars .
  • Complex carbohydrates are polymers, while simple sugars are monomers
• Are lipids polymers

  No

  • They aren’t formed from long chains of monomers
• Where in the body are carbohydrates in our diet broken down

  Mouth and small intestines
• What are biological molecules ?

  Molecules found in living organisms and are produced by cells
• Which three elements are lipids made from ?

  Carbon ,hydrogen and oxygen
• Name two complex carbohydrates

  Glycerol and starch
• Where in the body are the lipids in our diet broken down ?

  Small intestines
• Name an example of a simple sugar

  Glucose

  • or fructose or galactose
• Use the terms monomer and polymer to explain what a protein is ?


  • Proteins are made up of long chains of amino acids bonded together. A protein is a polymer and the amino acids it is made from are the monomers
• Where in the body are the proteins in our diet broken down

  Stomach and small intestines
• Which three biological molecule make up the majority of our diet (other than water) ?

  Carbohydrates, proteins, lipids
• What are nutrients ?

  Substances that are needed for growth, repair and metabolism