Let’s dive into the answers and explanations. Question 1: Draw and label a nucleotide. What are the three components?
The purine-to-pyrimidine ratio is always 1:1 in a double-stranded DNA molecule (Chargaff’s rule). Part 2: DNA Function (Replication & Central Dogma) Question 5: Explain the role of the following enzymes in DNA replication:
Hydrogen bonds hold the two strands together. Specifically, two hydrogen bonds form between A and T, and three hydrogen bonds form between G and C. Dna Structure And Function Worksheet Ap Biology Answer
What is the Central Dogma of molecular biology?
Understanding DNA structure and function is the cornerstone of molecular biology and a critical topic for the AP Biology exam. This post provides a comprehensive answer key for a typical AP Biology worksheet on DNA, including detailed explanations to help you understand why each answer is correct. Let’s dive into the answers and explanations
| 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. |
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. The purine-to-pyrimidine ratio is always 1:1 in a
If one strand of DNA has the sequence 5’-ATTCGAGC-3’, what is the complementary strand? Be sure to label the 5’ and 3’ ends.
Compare and contrast the leading strand and the lagging strand .