Many proteins interact with DNA at physiological pH because ________. a. Proteins are naturally attracted to DNA regardless of t
he pH b. Proteins and DNA interact using mainly hydrophobic interactions c. The positively charged DNA is electrostatically attracted to negatively charged regions on proteins d. The negatively charged DNA is electrostatically attracted to positively charged regions on proteins
Answer: Option D) The negatively charged DNA is electrostatically attracted to positively charged regions on proteins
Explanation:
Proteins are composed of several amino acids with positively charged amino groups in their side chain, while DNA is composed of several nucleotides with negatively charged phosphate groups.
Thus, there is an electrostatic attraction of negatively charged DNA to positively charged regions on proteins at physiological pH.
Many proteins interact with DNA at physiological pH because the negatively charged DNA is electrostatically attracted to positively charged regions on proteins.
<em>Direct purposes include bathing, drinking, and cooking, while examples of indirect purposes are the use of water in processing wood to make paper and in producing steel for automobiles.</em>
The ATP is broken down to release energy which is used to combine hydrogen (from the light reactions) with carbon dioxide to produce sugar. The reactions of carbon fixation are controlled by specific enzymes.
