What metal is present in hemoglobin?

Padlock

You have reached your daily limit.
Come back tomorrow for more questions!

Today's progress

  • Points won Points 0

  • Correct 0%

  • Answered 0

  • Best streak Streak 0

Learn more!


Source:

  • Choice "A": Iron % of users selected this choice.
  • Choice "B": Silver % of users selected this choice.
  • Choice "C": Gold % of users selected this choice.
  • Choice "D": Copper % of users selected this choice.
Did you know...
Here's one you can try at home: limes have a higher density than lemons. While they both look similar, a whole lime will sink in water, while lemons will float to the surface.
Image credit: Fauzan My.