MDCAT Biology MCQ #751

In a diagram representing a DNA nucleotide, to which specific carbon of the pentose sugar is the nitrogenous base covalently attached?

MDCAT Biology MCQ #751

  1. Question 1

    Q1. In a diagram representing a DNA nucleotide, to which specific carbon of the pentose sugar is the nitrogenous base covalently attached?

    • A) Carbon-1
    • B) Carbon-2
    • C) Carbon-3
    • D) Carbon-5

    Answer: Carbon-1

    Explanation: Nitrogenous bases attach to the first carbon (C1). C5 is tempting because it is where the phosphoric acid attaches to the sugar.