biology paper 1

• What are the parts of a plant cell

  • Cell wall
  • Permanent vacuole
  • Chloroplasts
  • Cell membrane
  • Nucleus
  • Ribosomes
  • Mitochondria
• Enzyme experiment


  1. Mix amylase + starch

  2. Remove drops every 10 seconds

  3. Add iodine

  4. Record time for no starch detected (orange)
• what is the test for starch and what colour does it go?

  Iodine test, red to blue-black.
• what is the test for sugar and what colour does it go?


  Benedict's test, red.
• what is the test for protein and what colour does it go?

  Biuret test Purple
• what is the test for lipids and what colour does it go?


  Sudan IV test, red.
• What is the function of ribosomes?


  Ribosomes are responsible for protein synthesis
• What is the function on the stomata?


  Gas exchange