During the elongation of a DNA strand, the 3' hydroxyl group of the existing chain attacks the incoming nucleotide. Which part of the incoming nucleotide is targeted?
Q1. During the elongation of a DNA strand, the 3' hydroxyl group of the existing chain attacks the incoming nucleotide. Which part of the incoming nucleotide is targeted?
Answer: 5' phosphate group
Explanation: Phosphodiester bonds form between the 3' OH of the chain and the 5' phosphate of the incoming nucleotide. Nitrogenous bases are involved in hydrogen bonding.