Now Let me talk to you about Translation to assemble amino acid strings of polypeptides or proteins that makes up all kinds of stuff from our titin to our keratin in our hairs. But most polypeptides are not structural, some are enzymes that acts as assembling machinery breaking down, building and combining carbohydrates and lipids and proteins that make up variation of cell materials.
First, the mRna that was from the transcription gets fed to the ribosomes which has binding sites to interact to tRna. tRna translates from the nucleotides to amino acids and proteins. On one end is an amino acid and on the other is the specific sequence of 3 nitrogenous bases. Now just like a puzzle the mRna slides into the ribosome, ribosome reads the mRna 3 letters at a time called the triplet codon. The ribosome then finds the piece of the puzzle a tRna with 3 anticodon.
The strand of mRna will keep sliding down the ribosome to get their matching anticodons. As this process continues, the previous amino acid will jump on the the new amino acid creating a polypeptide chain which is the very beginning of a protein. And this process will continue to translate more protein.
Now lets jump in to Lac Operon which is responsible for breakdown of lactose into sugars used for cellular metabolism. this involves bacterial DNA, a Repressor, mRNA and the sugar molecule lactose.
Lac Operon has 3 genes LacZ, LacY and LacA. LacZ - breaks lactose into glucose and galactose. LacY - lactose peemease- transport lactose inside the cell. LacA encodes Thiogalactoside transacetylase enzyme - helps remove toxic thiogalactosides transported by LacY.
Thank you for reading my textiles! and learning about DNA Transcription, Translation and LAC Operon with me!