Dna rna for moodle
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Protein synthesis involves two main steps: transcription and translation. During transcription, DNA serves as a template for RNA polymerase to synthesize mRNA in the nucleus. During translation, mRNA attaches to ribosomes in the cytoplasm where tRNAs bring amino acids that join together into a polypeptide chain based on the mRNA codons, ultimately forming the final protein product.
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Dna rna for moodle
- 1. Protein Synthesis: two parts! Transcription: DNA mRNA occurs in the nucleus Translation: mRNA protein occurs on the ribosome (in the cytoplasm)
- 2. Transcription (RNA Synthesis) DNA serves as a template for the synthesis of mRNA Within the nucleus RNA polymerase joins RNA nucleotides
- 3. Translation (mRNA to Protein) mRNA attaches to ribosome Each tRNA carries one amino acid Anticodon on tRNA matches with a codon on mRNA Amino acids join forming a polypeptide chain Long polypeptide chains form protein!!!
- 4. How does DNA “code” for protein? Each codon codes for 1 of 20 amino acids What amino acid chain would form from the mRNA: AUGGUCCAA Met–Val–Glu
- 5. The Genetic Code 64 different combinations of RNA bases 1 “start” codon Methionine 3 “stop” codons