The molecule of Protein synthesis

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The molecule of Protein synthesis RNA The molecule of Protein synthesis

Nucleic Acids Two Types of nucleic acids DNA RNA They both consist of sequences of N-containing bases joined by sugar-phosphate backbones - However, they differ in several aspects…

Types of RNA There are three major types of RNA - messenger RNA or mRNA - ribosomal RNA or rRNA - transfer RNA or tRNA

MESSENGER RNA mRNA Carries information that specifies a particular protein Produced in the nucleus Transported to the ribosome A three nucleotide codon specifies a particular amino acid Most mRNAs are 500-4,500 bases long

Transfer RNA tRNA Only 75-80 bases long The 2-D shape is a cloverleaf shape The 3-D shape is an inverted L Has two business ends: - The anticodon forms hydrogen bonds with the mRNA codon - The 3’ end binds the amino acid specified by the mRNA codon

Ribosomal RNA rRNA Associate with proteins to make up ribosomes Ribosomes consist of two subunits that join during protein synthesis rRNAs provide structural support - Some are a catalyst (ribozymes) Most rRNAs are from 100-3,000 bases long Found in two places in cell Cytoplasm: proteins destined for mitochondria or nucleus Attached to the endoplasmic reticulum : proteins destined for cell surface, lysosomes, Golgi, or remain on ER Large subunit Small subunit

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