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Organic Macromolecules Lab

Welcome to Week 4!

  • Watch Lecture 4 and complete the discussion post
  • Week 4 Content Quiz is now open
  • Exam 1 information has been posted!
  • Lecture assignments are due on Sunday, 9/15 at 11:59pm

Lecture Reminders

  • Post-lab quiz is due on Sunday, 9/15 at 11:59pm

Lab Reminders

Objectives

  • Identify the 4 types of macromolecules and their monomers
  • Identify the structure and functional groups of each of the macromolecules
  • Describe how living things use each of the macromolecules
  • Explain how the shape of a molecule affects its function
  • Describe how macromolecules are formed and broken apart and into what kind of monomers
Required PPE
  • Closed-toe shoes
  • Goggles
  • Gloves

Week 4: Organic Macromolecules Lab

1. Biuret TestMacromolecule?

Week 4: Organic Macromolecules Lab

1. Biuret TestMacromolecule?

  • Detects proteins
    • Detects the peptide bond
Color change?

Week 4: Organic Macromolecules Lab

Week 4: Organic Macromolecules Lab

1. Biuret TestMacromolecule?

  • Detects proteins
    • Detects the peptide bond
Color change?
  • Negative - blue
  • Positive - purple

Week 4: Organic Macromolecules Lab

2. Iodine TestMacromolecule?

Week 4: Organic Macromolecules Lab

2. Iodine TestMacromolecule?

  • Detects unbranched polysaccharides
Color change?

Week 4: Organic Macromolecules Lab

2. Iodine TestMacromolecule?

  • Detects unbranched polysaccharides
Color change?
  • Negative - yellow
  • Positive - black

Week 4: Organic Macromolecules Lab

3. Benedict's Test (No HCl)Macromolecule?

Week 4: Organic Macromolecules Lab

3. Benedict's Test (No HCl)Macromolecule?

  • Detects monosaccharides
    • Detects the carbonyl group in the sugar
Color change?

Week 4: Organic Macromolecules Lab

3. Benedict's Test (No HCl)Macromolecule?

  • Detects monosaccharides
    • Detects the carbonyl group in the sugar
Color change?
  • Negative - blue
  • Positive - red

Week 4: Organic Macromolecules Lab

4. Benedict's Test (With HCl)Macromolecule?

Week 4: Organic Macromolecules Lab

4. Benedict's Test (With HCl)Macromolecule?

  • Detects disaccharides
    • HCl breaks the bond between the two sugars
    • Detects the carbonyl group in each sugar
Color change?

Week 4: Organic Macromolecules Lab

4. Benedict's Test (With HCl)Macromolecule?

  • Detects disaccharides
    • HCl breaks the bond between the two sugars
    • Detects the carbonyl group in each sugar
Color change?
  • Negative - blue
  • Positive - red

  • For the rest of class, finish up the lab (Parts 2 and 3).

Week 4: Organic Macromolecules Lab