RNA and Protein Synthesis

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RNA and Protein Synthesis

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Presentation transcript:

RNA and Protein Synthesis

RNA RNA – Ribonucleic Acid Single stranded nucleotide chain Single stranded helix DNA’s Thymine is REPLACED by Uracil A & T “break up” because of the new guy: U But C & G are still 4-eva

RNA 3 types of RNA mRNA – messenger tRNA – transfer rRNA – ribosomal

CUGGUAUCG mRNA - messenger RNA DNA: GACCATAGC mRNA: Used for protein synthesis Codes for amino acid sequence made from DNA travels Nucleus  Cytoplasm  Ribosomes DNA: GACCATAGC mRNA: Codon: group of 3 bases “GAC” or “CAT” CUGGUAUCG

tRNA – transfer RNA Brings specific amino acid to the growing amino acid chain “fetching puppy” mRNA codon “UGG” Anticodon “ACC” Corresponding Amino Acid

The Genetic Code Use mRNA codons with chart!!!!

DNA sequence: TACCATAGC mRNA sequence: AUGGUAUCG 1st Codon in seq: AUG Find the 2nd letter in the codon across Find the 3rd letter in the codon down Find the first letter in the codon here

Codon “AUG”  Methionine (START)

Practice using your own chart DNA sequence: TCCAAT mRNA sequence: AGGUUA Codons: AGG UUA Amino Acid sequence: Arginine – Leucine

Argenine – Leucine – Aspartic Acid Proteins = polypeptide = amino acid chain Peptide Bonds – amino acids are connected together through peptide bonds

Transcription & Translation Transcription – stage of protein synthesis where instructions for making a protein are transferred to an RNA molecule DNA  mRNA : transcription Translation – stage of protein synthesis when the information in mRNA is used to make proteins mRNA  amino acid chain