Dna Structure And Function Worksheet Ap Biology Answer May 2026

| Enzyme | Function | |--------|----------| | | Unwinds and separates the double helix by breaking hydrogen bonds. | | DNA Polymerase III | Synthesizes new DNA strands by adding nucleotides to the 3’ end; also has 3’→5’ proofreading ability. | | Primase | Synthesizes a short RNA primer to provide a 3’-OH group for DNA polymerase to begin adding nucleotides. | | Ligase | Seals nicks (joins Okazaki fragments) on the lagging strand by forming phosphodiester bonds. | | Topoisomerase | Relieves supercoiling ahead of the replication fork to prevent DNA breakage. |

Let’s dive into the answers and explanations. Question 1: Draw and label a nucleotide. What are the three components? Dna Structure And Function Worksheet Ap Biology Answer

What type of bond holds the two strands of DNA together? Why is this bond important for DNA replication? | Enzyme | Function | |--------|----------| | |

Hydrogen bonds are relatively weak, allowing the two strands to be easily “unzipped” by enzymes like helicase without breaking the covalent bonds (phosphodiester bonds) within each strand. This allows each strand to serve as a template. | | Ligase | Seals nicks (joins Okazaki

Why is DNA replication considered semiconservative ?