MDCAT Biology MCQ #871

A diagram of a DNA nucleotide shows a phosphate group attached to the pentose sugar. To which specific carbon atom is this phosphate group linked?

MDCAT Biology MCQ #871

  1. Question 1

    Q1. A diagram of a DNA nucleotide shows a phosphate group attached to the pentose sugar. To which specific carbon atom is this phosphate group linked?

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

    Answer: Carbon 5

    Explanation: In a nucleotide, the nitrogenous base is at C-1 and the phosphate group is specifically attached to the C-5 of the pentose sugar.