For the catalytic activity of Cu and Zn containing enzyme, superoxide dismutase. What is /are the correct statement (S)?(A) Cu and Zn both are essential(B) Only Cu is essential(C) Zu is essential and Cu may be replaced by any other divalent metal atom(D) Zn may be replaced by any other divalent metal atom
(a)(A) only
(b)(C) Only
(c)(D) Only
(d)(B) and (D)
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
In Cu,Zn-SOD copper is the redox-active centre and is essential; zinc plays only a structural role and can be replaced by other divalent ions (Co²⁺, Hg²⁺ …) without loss of activity.