Each codon specifies a particular amino acid that is to be placed in the polypeptide chain (protein).
#Seminar speech central dogma of molecular biology l code#
Each combination of 3 nucleotides on mRNA is called a codon or three-letter code word. Protein Synthesis: Translation Translationis the process of decoding a mRNA molecule into a polypeptide chain orprotein. (mRNA leaves the nucleus and travels to the ribosome in the cytoplasm.)Ĭytoplasm Nuclear pores AAAAAA AAAAAA DNA Transcription RNA RNA Processing G G mRNA Export Nucleus Eukaryotic Transcription Protein Synthesis: Transcription Transcription process continued The RNA polymerase recognizes a termination site on the DNA molecule and releases the new mRNA molecule.
The RNA bases attach to the complementary DNA template, thus synthesizing mRNA. The DNA strands are separated and one strandserves as a template. Protein Synthesis Transcription Transcription process RNA polymerase (an enzyme) attaches to DNA at a special sequence that serves as a“start signal”. This is called messenger RNA (mRNA) because it acts as a messenger between DNA and the ribosomes where protein synthesis is carried out. Protein Synthesis Flow of Information: DNA RNA Proteins Transcription Translation Transcription is the process by which a molecule of DNA is copied into a complementary strand of RNA. DNA Transcription Ribosome mRNA Translation Polypeptide (protein) IntroductionThe Central Dogma of Molecular Biology Cell
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