MDCAT Biology MCQ #958

During the synthesis of DNA, a nucleoside is converted into a nucleotide. What is the chemical difference between these two molecules?

MDCAT Biology MCQ #958

  1. Question 1

    Q1. During the synthesis of DNA, a nucleoside is converted into a nucleotide. What is the chemical difference between these two molecules?

    • A) A nucleoside lacks a nitrogenous base
    • B) A nucleoside lacks a phosphate group
    • C) A nucleoside contains a hexose sugar
    • D) A nucleoside is the monomer of RNA only

    Answer: A nucleoside lacks a phosphate group

    Explanation: A nucleoside consists of a sugar and a base. A nucleotide adds a phosphate group to this combination.