Bio unit 2

• What is cancer?


  Abnormal cell division
• What describes the shape of DNA?

  A double helix
• What makes up the backbone of DNA?

  Sugar and Phosphate
• How does DNA differ in each person?

  By their base sequence
• The role of the hepatic portal vein 


  Transport of digested food molecules from intestine to the liver
• What is the liquid surrounding the foetus?

  Amniotic fluid
• What is the role of Amniotic Fluid?


  To cushion the foetus
• What is fertilisation?


  Where the sperm and egg nuclei fuse together
• What process takes place in the embryo following implantation?

  Differentiation
• What is active immunity?

  Body produces antibodies
• Advantages of booster vaccines

  More memory cells
• What is a genome?


  All the genetic material in a foetus
• Name a test for Down‘s syndrome

  Amniocentesis