In a biological reaction involving an enzyme, what does the active site of an enzyme bind to? A. the inactive site of another enzyme

B. the catalyst

C. the active site of another enzyme

D. the substrate

substrate

Explanation: The enzyme 's active site binds to the substrate. Increasing the temperature generally increases the rate of a reaction, but dramatic changes in temperature and pH can denature an enzyme, thereby abolishing its action as a catalyst.

i think the answer is gold im not entirely sure

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.