Question

Oxygen associates with haemoglobin under which of the following conditions?

• A. Low partial pressure of oxygen
• B. A high partial pressure of carbon dioxide
• C. Low H⁺ ion concentration
• D. High temperature

Answer 1

The correct option is C

Low H⁺ ion concentration

A low concentration of H⁺ ion is necessary for oxygen to associate with haemoglobin.
A low partial pressure of oxygen, a high partial pressure of $C{O}_2$, high H⁺ concentration and a high temperature lead to dissociation of oxygen from the haemoglobin.