Multiple choice

Which of the following statements is/are correct about hemoglobin?

  1. Each hemoglobin molecule can combine with two O2 molecules.
  2. Each hemoglobin molecule contains two globin units with two heme units.
  3. Deoxy- and oxyhemoglobin have different colours.

  1. Only 1

  2. Only 2

  3. Only 3

  4. Only 1 and 2

  5. Only 2 and 3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Deoxy- and oxyhemoglobin have different colours. This is why the blood in our arteries (oxyhemoglobin) is brighter red than the blood in our veins (deoxyhemoglobin).

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