Many Proteins Interact with DNA at Physiological PH Because

question 20

Multiple Choice

Many proteins interact with DNA at physiological pH because:

• A) proteins are naturally attracted to DNA regardless of the pH.
• B) the negatively charged DNA is electrostatically attracted to positively charged regions on proteins.
• C) the positively charged DNA is electrostatically attracted to negatively charged regions on proteins.
• D) proteins and DNA interact using mainly hydrophobic interactions.
• E) both proteins and DNA are at their isoelectric points at physiological pH and tend to aggregate.

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