17. When errors in nucleotide sequencing occur,
a. DNA polymerase replaces the incorrect nucleotide with the correct nucleotide
b. enzymes dissolve the incorrect nucleotide so DNA polymerase can add the correct one
c. purines replace pyrimidines in the DNA molecule
d. DNA polymerase proofreads for errors while another enzyme corrects it
[The link from yesterday didn't really help me find my answer...I think it is A]
Thanks
-MC
Multiple post. Please try your later post, which I saw first.
Sra
To determine the correct answer to this question, let's analyze each option and its relationship to errors in nucleotide sequencing:
a. DNA polymerase replaces the incorrect nucleotide with the correct nucleotide:
This is a correct statement. When errors occur during nucleotide sequencing, DNA polymerase has the ability to identify and remove the incorrect nucleotide from the growing DNA strand. It then replaces it with the correct nucleotide, ultimately fixing the error.
b. Enzymes dissolve the incorrect nucleotide so DNA polymerase can add the correct one:
This is an incorrect statement. Enzymes do not dissolve incorrect nucleotides. Instead, DNA polymerase itself recognizes the error and performs the necessary corrective action.
c. Purines replace pyrimidines in the DNA molecule:
This statement is unrelated to the question and is not true. Purines (adenine and guanine) do not replace pyrimidines (cytosine and thymine) during DNA replication or in error correction mechanisms.
d. DNA polymerase proofreads for errors while another enzyme corrects it:
This statement is partially correct. DNA polymerase has an inherent proofreading capability, during which it can identify and correct errors. However, it does not require the assistance of another enzyme to correct these errors.
Based on the analysis, option a is the correct answer. DNA polymerase replaces the incorrect nucleotide with the correct one when errors occur in nucleotide sequencing.