The Enzyme That Copies DNA Makes a Mistake Approximately Every

question 147

Multiple Choice

The enzyme that copies DNA makes a mistake approximately every 10,000 to 100,000 bases.Surprisingly,however,if we examine newly copied DNA,we see that the actual error rate is lower than this.How is that possible?

• A) The bases are self-correcting;the DNA will fix any errors as it is copied.
• B) The cell is immediately killed if it contains a mistake in its DNA.
• C) There are other enzymes that find errors in DNA and repair them.
• D) All of the above.
• E) None of the above.

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Definitions:

Reaction Mechanism

The detailed process or pathway through which reactants are converted into products in a chemical reaction.

Major Organic Product

The principal compound produced in an organic chemical reaction, often the focus of synthesis efforts.

Major Organic Product

The primary product formed in the greatest yield during an organic reaction.

Major Organic Product

The most abundant product resulting from an organic chemical reaction, often the desired outcome.