In the isolation and purification of extracting DNA from cells, a resin polymer by the name of Chelex is used. Which of the following best explains how it works?
A) represents the heat source that releases the DNA from a cell
B) binds to any charged ions that may degrade DNA
C) separates the DNA from the other cell components.
D) binds only to DNA molecules
E) allows DNA to precipitate out of solution.

Question

Quizplus · Accepted Answer

Chelex works by binding to magnesium ions and other metal ions which could act as cofactors for enzymes that degrade DNA, such as nucleases. By removing these ions, Chelex helps to protect the DNA from degradation during the extraction process.

In the Isolation and Purification of Extracting DNA from Cells