Dna Replication Essay

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The first major step in DNA replication is the breaking of hydrogen bonds between bases of the two strands. Helicase is the enzyme that splits the two strands. The point where the splitting starts is called the origin of replication. The structure that is created is known as the replication fork. The second step is the binding of RNA primase in the initiation point of the 3-5 parent chain. RNA nucleotides are the primers for the binding of DNA nucleotides. The third step the 3-5 proceeding strand uses a 5-3 template is called the leading strand because DNA polymerase can read the template and continuously adds nucleotides. The fourth step the lagging strand reads the fragments and removes the RNA primers. The gaps are closed with the action of DNA polymerase and DNA ligase. The fifth and final step of DNA replication is Termination. This process happens when the DNA polymerase reaches to an end of the strands, when the RNA primer is removed; it is not possible for the DNA polymerase to seal the gap. So, the end of the parental strand where the last primer binds isn’t replicated. The first step in protein synthesis is the transcription of mRNA from a DNA gene in the nucleus. The other types of RNA have been synthesized using the DNA. The RNAs migrate from the nucleus into cytoplasm. The second step of protein synthesis is actually initiated by the AUG codon on mRNA. The AUG codon signals both the interaction of the ribosome with mRNA and also the tRNA with the anticodons UAC. The third step is the elongation of the peptide. It begins as various tRNA read the next codon. The fourth step is termination. When the stop signal on mRNA is reached, the protein synthesis is terminated. The last amino acid is hydrolyzed from its

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