How do you think a protein is like a beaded necklace?

Application: Dietary Fibre

Textbook page 20

Protein

In your pairs

1.Where do you get it from?

2.What do you use it for?

Memorise....

H

Recreate!

Amino Acid

Monomer of protein

Amine group

Carboxylgroup

R group/ side chain

Amine group

Carboxyl group

R group/Side chain

Use kits to make amino acids – use X as R group

DO NOT BREAK UP YOUR MODELS

H

R gr ou ps

Draw the amino acid phenylalaninePhenylalanine R group

Ma king a

Di-p ep tide

Peptide Bond

Pro tein Fo ldin g

Ter tiar y St ruc tur eDisulphide bridges

Hydrogen bonds

ProteinsMonomer

Polymer

Bonds between monomers

Reaction

DenaturationIf we were to heat a protein....- Hydrogen bonds break- Tertiary Structure is lost

When you boil an egg what happens to the white?What was it like before,? What is it like now?Can you reverse the process?

Summary Questions: P 22

1. Name the monomers that make up (i) carbohydrate and (ii) protein

2. Name three polysaccharides of glucose

3. What reaction joins two carbohydrate monomers?

Practice Questions

1. How is one amino acid different to another?

2. Explain why a pregnant woman needs to eat more protein in her diet than a non pregnant woman of the same age and body mass

Making NotesProtein Subunits

Tertiary Structure

Denaturation

Past Paper Questions