mismatch error to be repaired? Which is the best answer, I think it's A.
Can someone who know's science tell me if I am right?
A)Damaged DNA must be identified by DNA repair proteins
B)The sequence of nucelotides in the damaged DNA sequence must guide the synthesis of the correct DNA sequence
C)Entire strands of damaged Dna must be destroyed by DNA eating enzymes within the nucleus.
The best answer to repair a mismatch error would be A) Damaged DNA must be identified by DNA repair proteins. Mismatch errors occur when there is a mispairing of bases during DNA replication or DNA repair. DNA repair proteins are responsible for recognizing and repairing these errors. Once the damaged DNA is identified, the repair proteins can initiate the repair process. B) The sequence of nucleotides in the damaged DNA sequence must guide the synthesis of the correct DNA sequence is not the most accurate answer for mismatch repair. While DNA synthesis does occur during repair, it is not specifically guided by the damaged DNA sequence itself. C) Entire strands of damaged DNA must be destroyed by DNA eating enzymes within the nucleus is not an accurate statement for mismatch repair. Mismatch repair aims to correct specific errors without destroying entire DNA strands. It is also not carried out by "DNA eating enzymes".
To determine the best answer, let's analyze each option:
A) Damaged DNA must be identified by DNA repair proteins
This option is correct. When there is a mismatch error in DNA, DNA repair proteins recognize the damage and initiate the repair process. These proteins identify the damaged DNA and take steps to fix it.
B) The sequence of nucleotides in the damaged DNA sequence must guide the synthesis of the correct DNA sequence
This option is also correct. Once the damaged DNA is identified, the correct sequence of nucleotides needs to be synthesized. The DNA repair process uses the existing DNA strand as a template to guide the synthesis of the correct DNA sequence, fixing the mismatch error.
C) Entire strands of damaged DNA must be destroyed by DNA-eating enzymes within the nucleus
This option is incorrect. Mismatch errors in DNA repair do not involve destroying entire strands of damaged DNA by DNA-eating enzymes. Rather, the focus is on repairing the specific mismatch error by correcting the sequence.
Therefore, the best answer is A) Damaged DNA must be identified by DNA repair proteins. This step initiates the repair process, allowing the correct DNA sequence to be synthesized based on the existing DNA strand template.