Question

Place the following statements in the correct order in regards to dna replication: i. dna helicase unzips the dna molecule ii. nitrogen bases attach to the old dna strand to create the complimentary strand iii. dna polymerase proofreads to correct mistakes?

1) i, ii, iii
2) ii, i, iii
3) iii, ii, i
4) iii, i, ii

Answer 1

The correct order of steps in DNA replication is: (i) DNA helicase unzips the DNA molecule, (ii) nitrogen bases form the complementary strands, and (iii) DNA polymerase proofreads the new DNA.

Step-by-step explanation:

Regarding the correct order of the steps in DNA replication, they should follow this sequence: (i) DNA helicase unzips the DNA molecule, (ii) nitrogen bases attach to the old DNA strand to create the complementary strand, and (iii) DNA polymerase proofreads to correct mistakes.

Therefore, the correct order is option 1) i, ii, iii. First, the DNA molecule is unwound at the origin of replication by DNA helicase, which breaks the hydrogen bonds between nucleotides, forming a replication fork.

Next, complementary nitrogen bases are added and linked to the old DNA strands to form the new complementary strands.

The newly synthesized DNA is then proofread by DNA polymerase to ensure fidelity in the replication process.