Multiple choice

The trace of which metal is present in insulin?

  1. Iron

  2. Zinc

  3. Cobalt

  4. Manganese

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Insulin is stored in the pancreas as zinc-insulin hexamer crystals. Zinc ions stabilize insulin's structure and are essential for its storage and release. This trace metal is crucial for insulin's biological activity.