Which of the following statements about nucleotide synthesis is (are)true?
(I)Most dietary nucleotides are salvaged and used in DNA synthesis.
(II)Most nucleotides in cells are from de novo pathways.
(III)Most nucleotides in cells are salvaged and used in RNA synthesis.
A)I,II
B)I only
C)II only
D)II,IV
E)III only

Question

Quizplus · Accepted Answer

II onlyMost nucleotides in cells are synthesized through de novo pathways, where new nucleotides are synthesized from small molecules. While salvage pathways do exist and are important for recycling nucleotides, they do not contribute the majority of nucleotides used in cells. Dietary nucleotides can be absorbed and used, but they are not the primary source for DNA synthesis.

Which of the Following Statements About Nucleotide Synthesis Is (Are)true