Question

question 7 of 25
how does the structure of dna help prevent errors from occurring during
dna replication?
a. rna primers are added to specific sequences on the template
strands so that replication always starts at the same place.
b. weak hydrogen bonds make it easy for dna ligase to remove and
replace sequences that contain mistakes.
c. the strength of the sugar - phosphate backbones prevents
nucleotides from becoming separated or getting out of sequence.
d. due to the complementary nature of base pairing, elongation is
paused when dna polymerase adds the wrong nucleotide.

Explanation:

DNA replication has proof - reading mechanisms. When DNA polymerase adds a wrong nucleotide, the complementary base - pairing (A - T, G - C) is disrupted. This disruption causes the elongation process to pause. The DNA polymerase can then correct the error. RNA primers (Option A) are for starting replication, not error prevention. DNA ligase (Option B) joins Okazaki fragments, not for error removal in this context. The sugar - phosphate backbone (Option C) provides structural support but not error - prevention related to base - pairing.

Answer:

D. Due to the complementary nature of base pairing, elongation is paused when DNA polymerase adds the wrong nucleotide.