1. Unit 4 - The Natural Environment and Species Survival
Topic 6 – Immunity, Infection and Forensics
Recap of DNA and RNA structure
Genetic Code - Triplet & Degenerate
Protein Synthesis - Part 1

2. Double Helix

3. Genetic Code
The sequence of nucleotides on a gene which provides a code with instruction for the construction of a polypeptide or protein.

4. Genetic Code is ... Triplet Code: Degenerate Code:
Non-overlapping Code:

6. Protein Synthesis

7. Protein Synthesis 1) Transcription – Copying the DNA code to mRNA
2) Translation – Using the mRNA sequence to assemble amino acids into a polypeptide.

8. Transcription

9. A Nucleotide

10. 3’ and 5’ ends of DNA strand

13. Homework
Read pages 72 – 74 in book – write definitions for terms in bold and write 10 bullet points on the key concepts for your notes.