Tuesday, August 18, 2009

Transcription in Eukaryotic Cells


The Transcription in Eukaryotic Cells of DNA to protein is called transcription, the process of RNA is synthesized from the direction of DNA. The three steps are initiation, elongation, and termination. MRNA copies the DNA strands and the genetic information is carried to the three bases codons. The codons are translated into a linear sequence of amino acids in polypeptide chains. RNA is formed from nucleotide subunits, a single base and three phosphates RNA binds with the DNA sequenced called promoter region. Nucleotides pair with the complementary bases on DNA strands. There are three stages in RNA polymerase I rRNA Ribosomal RNA: With ribosomal proteins, makes up the ribosomes, the organelles that translate the mRNA, II is mRNA Messenger RNA: Encodes amino acid sequence of a polypeptide, and III is tRNA Transfer RNA: Brings amino acids to ribosomes during translation. Transcription begins at the promote and ends at the terminator.

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