DNA Protein Synthesis DNA structure Review Is a

DNA – Protein Synthesis

DNA structure - Review • Is a Nucleic Acid • Made of: – Contains Deoxyribose as its sugar – Contains the nitrogenous bases: • adenine, guanine, cytosine, thymine SO…what is an RNA structure?

RNA structure • Is a Nucleic Acid • Made of: – Contains ribose as its sugar – Contains the nitrogenous bases: • adenine, guanine, cytosine, Uracil

DNA • What can DNA do? • Contains the directions on how to build a protein – Directions are in the sequence of nitrogen bases in the DNA – Problem: Where is DNA? Where are proteins built?

Template strand (Protein)

Draw a cell indicating the locations of these processes

Transcription • An enzyme RNA Polymerase unzips and reads one of the DNA strands to make a portable copy of the directions m. RNA

Practice A-T T-A C-G G-T A-T G-C T-A The template strand is the on the right. Write the sequence of the m. RNA molecule that would be made from this template

Translation • Code in the m. RNA is now translated into a sequence of amino acids – Each group of 3 nucleotides is a CODON – Each codon codes for a specific amino acid

Met - Gln - Arg - Cys

Translation • How is the right amino acid brought in at the correct time? • This is the job of t. RNA – Many variations of t. RNA – Have 2 important areas to be able to do their job • Amino acid binding area – A specific amino acid attached to the top • Anti-codon – 3 nucleotide sequence at bottom that will base pair with the m. RNA codon

Translation • Occurs at the Ribosome