Starter

• Collect some scrap paper

• Name on

• True/false for the following statements

1. There are 6 bases in DNA

2. A double helix is made from 2 DNA strands

3. A is complementary (joins) to G

Learning objectives

• Recall the basic structure of a protein

• State the relationship between genes and protein structure

• Explain how protein structure is determined by the DNA base code

Book task

• Use page 3 of the blue textbook to answer the following questions in full sentences (to make notes)

1. What is protein synthesis and where does it take place in the cell?

2. What type of proteins does the body use?

3. What is a protein made from?

4. What is transamination?

5. Where does transamination take place?

Essential amino acids

• There are 20 amino acids

• 8 of these amino acids cannot be made by the body by transamination so we need to take those into the body in the diet.

• How many essential amino acids are there?

Making proteins

• A gene is a section of DNA that codes for something e.g. a protein

• 3 bases code for one amino acid – recipe

Key exam points

1. Base sequence in the DNA determines the amino acid sequence in the protein

2. Each amino acid is coded for by a sequence of 3 bases

Plenary

I have given you a sheet with

1. The triplet code for amino acids on

2. A DNA sequence for a protein

Your taskYour task

Give me the amino acid sequence of the protein

How did you do?

Tyrosine – Glutamine – Threnonine – Valine – Aspartic acid – Arginine - Isoleucine