Which of the following must occur for a mismatch error to be repaired? Which is the best answer, I think it's A, am I 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.
If this is the same as the Biology post, please look there, as I saw it first and answered it.
Sra
To determine the correct answer, we need to evaluate each option and understand its role in repairing a mismatch error:
A) Damaged DNA must be identified by DNA repair proteins: This statement is partially correct. DNA repair proteins do play a role in recognizing damaged DNA, but it is not specific to mismatch errors. Mismatch errors occur during DNA replication and are typically repaired by a different mechanism. Therefore, option A is not the best answer.
B) The sequence of nucleotides in the damaged DNA sequence must guide the synthesis of the correct DNA sequence: This statement is the most accurate and relevant to the repair of a mismatch error. During DNA replication, DNA polymerase enzymes are responsible for synthesizing a new DNA strand based on the template strand. They use the sequence of nucleotides in the template DNA to guide the synthesis of the complementary strand, ensuring the correct sequence is restored. This is the main mechanism for repairing a mismatch error, making option B the best answer.
C) Entire strands of damaged DNA must be destroyed by DNA-eating enzymes within the nucleus: This statement is incorrect and unrelated to the repair of mismatch errors. DNA-eating enzymes (known as nucleases) do exist in the cell, but their primary function is not to destroy damaged DNA. They are involved in other DNA-related processes, such as DNA digestion in apoptotic cells. Therefore, option C is not correct.
In conclusion, the best answer to the question is B) The sequence of nucleotides in the damaged DNA sequence must guide the synthesis of the correct DNA sequence.