IBDP Biology: DNA Replication

In this chapter of IBDP Biology, we will learn about the process and components of DNA Replication.

• In the nucleus, DNA unwins and unzips Hydrogen bonds between the complementary nucleotides break
• RNA polymerase catalyses the pairing of free RNA nucleotides to the template strand of the DNA
• The RNA strand is identical to the other coding strand of DNA

• The mRNA chain passes out of the nucleus through a nuclear pore
• Exons are regions of the RNA strand that code for the amino acids of the protein being synthesized whereas  introns are segments that do not code for the protein and are not useful
• Introns are cut out and the exon regions are spliced together to form a long chain of codons
• The mRNA chain progresses out of the nucleus and over onto the rough endoplasmic reticulum that has the ribosomes on it

• In this chapter of IBDP Biology, transfer RNA molecules bring amino acids to the ribosome and pair up their anticodons with the codons in the mRNA molecule.
• Peptide bonds form between the adjacent amino acids forming the polypeptide
• ATP is required for translation
• When the polypeptide has been assembled the RNA chain breaks down to be recycled again
• The newly synthesized polypeptide is folded into its shape to form the protein

This is the end of this topic.

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