Unit 4 - The Natural Environment and Species Survival

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Presentation transcript:

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

Double Helix

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

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

Protein Synthesis

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

Transcription

A Nucleotide

3’ and 5’ ends of DNA strand

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.