Let's fill in the blanks based on the information about DNA, RNA, and protein synthesis.
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DNA carries the genetic information. However, it cannot leave the nucleus because of this it copies parts of its nucleotide sequence into a complementary copy of mRNA during the process called transcription. During this process, the enzyme RNA polymerase separates the DNA strands; one strand of DNA serves as the template from which nucleotides are assembled into a strand of RNA.
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Each 3-letter sequence of the mRNA is called a codon. The start codon is AUG, and the 3 stop codons are UAA, UAG, and UGA. Once the mRNA leaves the nucleus, it goes to the ribosome to prepare for protein synthesis, which is called translation. During this process, a tRNA molecule brings the amino acids to the ribosome, where the amino acids are hooked together by peptide bonds. The tRNA is able to match up to the mRNA by the anticodon in its cloverleaf structure. When the stop codon is reached, the polypeptide chain is released into the cytoplasm.
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