QuestionAugust 21, 2025

2. Why are errors in DNA replication common and difficult to prevent?

2. Why are errors in DNA replication common and difficult to prevent?
2. Why are errors in DNA replication common and difficult to prevent?

Solution
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Answer

Errors in DNA replication are common due to enzyme limitations and external factors, and difficult to prevent because existing repair mechanisms are not completely effective. Explanation 1. Understand DNA replication DNA replication is a complex process involving the unwinding of the double helix and synthesis of new strands by enzymes. 2. Identify sources of errors Errors occur due to the inherent limitations of DNA polymerase, which can insert incorrect nucleotides. 3. Explain error prevention mechanisms Although proofreading and mismatch repair mechanisms exist, they are not foolproof and cannot catch all errors. 4. Consider external factors External factors like chemical mutagens or radiation can also introduce errors that are difficult to prevent.

Explanation

1. Understand DNA replication<br /> DNA replication is a complex process involving the unwinding of the double helix and synthesis of new strands by enzymes.<br /><br />2. Identify sources of errors<br /> Errors occur due to the inherent limitations of DNA polymerase, which can insert incorrect nucleotides.<br /><br />3. Explain error prevention mechanisms<br /> Although proofreading and mismatch repair mechanisms exist, they are not foolproof and cannot catch all errors.<br /><br />4. Consider external factors<br /> External factors like chemical mutagens or radiation can also introduce errors that are difficult to prevent.
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