MDCAT Biology MCQ #733

During DNA replication, a new nucleotide is added to a growing strand. Which specific carbon positions are involved in forming the phosphodiester linkage?

MDCAT Biology MCQ #733

  1. Question 1

    Q1. During DNA replication, a new nucleotide is added to a growing strand. Which specific carbon positions are involved in forming the phosphodiester linkage?

    • A) 3' phosphate and 5' hydroxyl
    • B) N-glycosidic bond formation
    • C) 5' phosphate and 3' hydroxyl
    • D) Hydrogen bonding between pentoses

    Answer: 5' phosphate and 3' hydroxyl

    Explanation: The bond forms between the 5' phosphate of the new nucleotide and the 3' hydroxyl of the existing chain. Glycosidic bonds link sugars to bases.