Ch 10.4 RNA (RIBONUCLEIC ACID) Function: All traits you have due to proteins of amino acids Genes contain “blueprints” to make protein Ribosomes are site.

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Presentation transcript:

Ch 10.4 RNA (RIBONUCLEIC ACID) Function: All traits you have due to proteins of amino acids Genes contain “blueprints” to make protein Ribosomes are site of protein synthesis RNA reads blueprints & makes protein

Structure: Single Strand Sugar = ribose Phosphate group Bases = adenine, guanine, cytosine, URACIL (replaces T)

Types: mRNA: messenger (carries info to ribosome) rRNA: ribosomal (makes up ribosomes) tRNA: transfer (moves amino acids to ribos)

Gene Expression: Transcription: RNA copy of gene made Translation: Proteins made DNA RNA PROTEIN TranscriptionTranslation

PRACTICE DNA = ATCGATAC Complementary DNA = mRNA = TAGCTATG AUCGAUAC DNA = TCCGTACG Complementary DNA = mRNA = AGGCATGC UCCGUACG

PROTEIN SYNTHESIS (TRANSLATION) The Genetic Code Every 3 nucleotides in mRNA code for specific amino acid; triplet or codon Genetic code is universal; same in all orgs tRNA anticodon is complementary to mRNA codon; picks up amino acids

THE GENETIC CODE mRNA CODONS

Exon – gene that is expressed; coding portion of dna Intron – gene that is not expressed; non- coding portion of dna

PRACTICE What amino acids are coded for by the following mRNA codons? GUC UAC AAA Val Tyr Lys CCG UCG GCA Pro Ser Ala What are the possible codons for the following series of amino acids? Phe – Tyr - Met UUU UAU AUG UUC UAC

What are the complementary mRNA codons to the tRNA anticodons? UUU UGC AGA AAA ACG UCU