Which characteristic of DNA best allows for high levels of accuracy during the human replication?

Answer 1

It's not all that accurate. We all have mistakes in our DNA. Some of them aren't expressed, and some of them are minor. Some, like progeria, are major.

Find the part of your book that says why DNA allows for high levels of accuracy...and write that down on your homework paper. The best answer is the one your teacher wants. Not necessarily the right one.

Answer 2

DNA is "written" by an enzyme called DNA Polymerase (there are actually 3 of these enzymes, creatively named DNA Polymerase I, DNA Polymerase II and DNA Polymerase III)

DNA polymerase II is the most accurate enzyme. It creates an exact copy of your DNA each time, making less than one mistake in a billion bases. This is far better than information in our own world: imagine reading a thousand novels, and finding only one mistake. The excellent match of cytosine to guanine and adenine to thymine, the language of DNA, provides much of the specificity needed for this high accuracy. But DNA polymerase adds an extra step. After it copies each base, it proofreads it and cuts it out if the base is wrong.