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  • Mixed GK
  • One molecule of hemoglobin binds
Multiple choice

One molecule of hemoglobin binds

  1. 2 O2 molecules

  2. 4 O2 molecules

  3. 1 O2 molecules

  4. 3 O2 molecules

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

Each hemoglobin molecule contains four heme groups, allowing it to bind up to four molecules of oxygen (O2).

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