Science B3 - DNA, Proteins and Mutations 0.0 / 5 ? Applied ScienceB3GCSEOCR Created by: chlo-smallmanCreated on: 19-02-14 12:22 Where is the code thats needed to produce a protein carried from? from the DNA to the ribosomes by a molecule called mRNA. 1 of 8 Proteins are coded for by DNA The base sequence codes for the order of amino acids. Each amino acid is coded for by three bases. 2 of 8 What are CHROMOSOMES? long,coiled molecules of DNA, divided up into regions called genes. 3 of 8 What are PROTEINS? made up of long chains of amino acids. They can be structural, hormones, carrier molecules or enzymes. 4 of 8 Mutations may lead to the production of different proteins. WHY? Due to a change in bases in DNA can change the amino acid sequence. 5 of 8 Enzyme activity is affected by pH and temperature. This is due to: Lower collision rates at lower temperatures. Denaturing at extremes of pH and high temperatures. 6 of 8 Where does PROTEIN SYNTHESIS occur? On ribosomes in the cytoplasm. 7 of 8 What are ENZYMES? specific and work by a lock and key mechanism. 8 of 8
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