Biology 9700 · AS & A Level · Movement into and out of cells

Movement into and out of cells — practice question

Which of the following does not assist in maximising oxygen uptake as blood passes through the capillaries in the lungs?

  • ADissociation of carbon dioxide from carboxyhaemoglobin allows more haemoglobin to be available for oxygen binding.
  • BEach haemoglobin molecule can temporarily bind to eight oxygen atoms.
  • COxyhaemoglobin formation increases the capacity of red blood cells to transport oxygen.
  • DThe binding of the first oxygen molecule to haemoglobin increases the molecule’s affinity for binding other oxygen molecules.

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI