self-replication

• 1. DNA helicase breaks the H bonds between the 2 polynucleotide DNA strands. helix unzips to form 2 single strands
• 2. Each original single strand acts as a template for a new strand. free floating DNA nucleotides join to the exposed bases on each original template strand by complementary base pairing
• 3. nucleotides of the new strand are joined together by the enzyme DNA polymerase which forms the sugar-phosphate backbone. hydrogen bonds form between the bases on the original and new strand. strands twist to form a double helix
• 4) Each new DNA molecule contains 1 strand from the original DNA molecule and one new strand
• 1. helicase breaks down hydrogen bonds and helix unzips to form 2 strands
  2. bases match up using complementary base pairing
  3. DNA polymerase joins the nucleotides. Hydrogen bonds form between the strands
  4. each DNA molecule contains a new and an original DNA strand
• semi-conservative replication - half of the strands in Each DNA molecule are from the original piece of DNA
• helicase - unzips 2 DNA strands and breaks the H bonds that holds the DNA bases together
• DNA Polymerase- replicates DNA molecules to build a new strand of DNA
• Primase - makes the primer so DNA polymerase can figure out where to go to start to work primer is made from DNA
• Ligase - "gluer" helps glue DNA fragments together