Dna Structure And Function Worksheet Ap Biology Answer Instant | Purines (two rings) | Pyrimidines (one ring) | |---------------------|------------------------| | Adenine (A) | Cytosine (C) | | Guanine (G) | Thymine (T) | | (Also Uracil in RNA)| | Let’s dive into the answers and explanations. Question 1: Draw and label a nucleotide. What are the three components? What type of bond holds the two strands of DNA together? Why is this bond important for DNA replication? Dna Structure And Function Worksheet Ap Biology Answer Why is DNA replication considered semiconservative ? 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: | Purines (two rings) | Pyrimidines (one ring) Semiconservative replication means that each new DNA double helix contains one original (parental) strand and one newly synthesized daughter strand . This was proven by the Meselson-Stahl experiment using isotopic nitrogen (¹⁵N and ¹⁴N). What is the Central Dogma of molecular biology? What type of bond holds the two strands of DNA together 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.