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Protein Synthesis Simplified PowerPoint Presentation

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Protein Synthesis Simplified Presentation Transcript

Slide 1 - Protein Synthesis With thanks to Jenny P
Slide 2 - ppt slide no 2 content not found
Slide 3 - DNA is a very long molecule that looks like a twisted ladder. It is made up of 4 different subunits called nucleotides which can be arranged in any order
Slide 4 - The bases are complementary DNA has two strands. The strands are stuck together by the complementary bases. Adenine to Thymine A-T Cytosine to Guanine C-G
Slide 5 - ppt slide no 5 content not found
Slide 6 - It is the Sequence of bases that act like a code The sequence (order) of bases tells the cell what proteins to make. The sequence of bases dictates the sequence of amino acids, which determines the shape of a protein. If the protein is the wrong shape it will not work properly (it may work differently) So if the sequence in the DNA is wrong it may result in a genetic disease
Slide 7 - Sickle cell anaemia is caused by one change in the DNA base code
Slide 8 - It is a triplet code. It takes 3 bases to code for one amino acid
Slide 9 - Each triplet codes for a different amino acid.
Slide 10 - DNA carries the code for every protein that can be made by a cell. A gene is a length of DNA which codes for a particular protein Protein Synthesis takes place in 2 stages
Slide 11 - Part of the DNA molecule (the gene) unzips An RNA copy is produced, by matching complementary bases Transcription 1 (making a messenger RNA copy of DNA)
Slide 12 - Transcription 2 The mRNA copy is made with the help of RNA polymerase.
Slide 13 - Complementary base pairing C G U A
Slide 14 - The m-RNA leaves the nucleus through a nuclear pore RNA leaving the nucleus Nuclear membrane RNA in the cytoplasm
Slide 15 - Translation The m-RNA goes to the Ribosomes in the cytoplasm A B C D E F
Slide 16 - ppt slide no 16 content not found
Slide 17 - The ribosomes read the code and join the amino acids together
Slide 18 - Transfer RNA brings the correct amino acid
Slide 19 - Translation - animation
Slide 20 - This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com Is home to well over a thousand powerpoints submitted by teachers. This a free site. Please visit and I hope it will help in your teaching