Question

When dna replicates the original dna is not affected and a new double-stranded dna is made from two new strands of dna. one strand of the original dna ends up in each of the new dna molecules. the original dna unwinds, and multiple copies of a region are transcribed before the dna closes back up. transcription factors determine where to begin dna replication. none of the answer choices are correct?

Answer 1

Correct option: one strand of the original dna ends up in each of the new dna molecules.

Explanation: When DNA replicates, the original DNA unwinds and both the unwinded strands act as a template to make new strand. This way, the new DNA has one original copy and one new copy of DNA. That's why we call it "Semi-conservative mode of Replication". Also transcription factors have no role in DNA replication. There are separate molecules which initiate DNA replication.