DNA carries the cell’s genetic information; however, it cannot leave the nucleus. Because of this, it copies part of its nucleotide sequence into a complementary copy of mRNA during the process called transcription. During this process, the enzyme helicase separates the DNA strands. One strand of DNA acts as the template from which nucleotides are assembled into a strand of RNA. Each three-letter sequence on the mRNA is called a codon. The start codon is AUG and the three stop codons are UAG, UGA, UAA. Once the mRNA leaves the nucleus, it goes to the ribosome to prepare for protein synthesis, which is called translation. During this process, a molecule called transfer RNA (tRNA) brings the amino acids to the ribosome. The amino acids are hooked together by peptide bonds. The tRNA is able to match up to the mRNA by the complementary base pairing in its anticodons. When the stop codon is reached, the polypeptide chain is released into the cytoplasm.
DNA carries the cell’s genetic information; however, it cannot leave the nucleus. Because of this, it copies part of its nucleotide sequence into a complementary copy of mRNA during the process called transcription. During this process, the enzyme, helicaseseparates the DNA strands. One strand of DNA acts as the template from which nucleotides are assembled into a strand of RNA. Each three letter sequence on the mRNA is called a codon . The start codon is AUG and the three stop codons are UAG UGA UAA. Once the mRNA leaves the nucleus, it goes to the to prepare for protein synthesis, which is called . During this process, a molecule brings the to the ribosome. The amino acids are hooked together by bonds. The tRNA is able to match up to the mRNA by the in its anticodons. When the codon is reached, the chain is released into the .
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