B3

B3

1. A - Molecules of Life

   • Cell
     • Cell Membrane
       • Controls movement in/out of cell
     • Cytoplasm
       • Mitochondria
         • Energy
     • Nucleus
       • Membrane extending out of
         • Ribosomes attached
     • Ribosome
   • DNA
     • Deoxyribonucleic acid
     • Double helix
     • Bases (A-T & C-G)
     • Watson & Crick
   • Protein Synthesis
     • 3 bases = 1 Amino acid
     • Ribosomes
     • MRNA (Messenger)

2. B - Proteins & Mutations

   • Collagen
     • Structural Protein
   • Insulin
     • Controls Blood sugar levels
   • Haemoglobin
     • Carrier Protein, binds w/ oxygen
   • Enzymes
     • Work best at 37°C in Humans
     • Optimum pH can vary
       • Saliva - pH 7.3
       • Pepsin (stomach) - Very acidic ~pH 3??
     • Control Chemical Reactions
     • Biological catalyst

3. C - Respiration