protein synthesis (simplified)

protein synthesis (simplified) - protein Protein Synthesis...

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Protein Synthesis With thanks to Jenny P
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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
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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
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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
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Sickle cell anaemia is caused by one change in the DNA base code
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It is a triplet code. It takes 3 bases to code for one amino acid
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Each triplet codes for a different amino acid.
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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
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Unformatted text preview: protein Protein Synthesis takes place in 2 stages • 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) Transcription 2 • The mRNA copy is made with the help of RNA polymerase. Complementary base pairing DNA Base Complementary RNA Base G C A T C G U A The m-RNA leaves the nucleus through a nuclear pore RNA leaving the nucleus Nuclear membrane RNA in the cytoplasm Translation • The m-RNA goes to the Ribosomes in the cytoplasm A B C D E F The ribosomes read the code and join the amino acids together Transfer RNA brings the correct amino acid Translation - animation 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...
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This note was uploaded on 11/07/2011 for the course BIOLOGY 100 taught by Professor Staff during the Winter '08 term at BYU.

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protein synthesis (simplified) - protein Protein Synthesis...

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