key concepts

• describe an enzyme and substrate complex?

  each enzyme has a unique shape and is responsible for the active site the place where the reactant attaches to the enzyme
• what happens during mitosis?

  • interphase - DNA duplicates
  • prophase - membrane breaks down around the nucleus
  • metaphase - the chromosomes line up in the middle of the cells
  • anaphase - spindle fibres pull apart chromones to each side of the phase
  • telophase_ membrane forms around each chromosome forms nuclei for each cell. ( identical daughter nuclei)
• Stem cells

  1. experimented that u can use embryonic stem cells to change it into any type of stem cells to help cure diseases
  2. helps us understand the health issues
• meiosis?

  1. duplicates
  2. chromosomes pair up
  3. which divide
  4. and divide again to create 4 genetically different daughter cells
• why is a cell described by eukaryotic?


  they have membrane bound organells