Question

The correct option for the metal ion present in the active site of myoglobin, hemocyanin and vitamin B12, respectively, is

• A. iron, iron and zinc
• B. molybdenum, iron and copper
• C. iron, copper and cobalt
• D. copper, copper and cobalt

Hint:

Each of these biomolecules uses specific metal ions for their functions: myoglobin uses iron, hemocyanin uses copper, and vitamin B12 uses cobalt.

Answer 1

The Correct Option is C

Step 1: Identify the metal ions.
Myoglobin contains an iron ion, hemocyanin contains copper, and vitamin B12 contains cobalt.
Step 2: Conclusion.
The correct metal ions are iron, copper, and cobalt, corresponding to option (C).