Question

Haldane believes oxyhaemoglobin to act as.

• A. Acid
• B. Alkali
• C. Buffer
• D. None of the above

Answer 1

Answer: (A)

Acid

• Haemoglobin accepts H+ when CO2 is the more effective constituent present at the level of tissues and releases H+ when O2 is the more effective constituent present at the level of lungs.
  
• Hence, during oxyhaemoglobin formation, an H+ is released leading to its acidic nature, as explained by Haldane.
  

So, the correct option is 'Acidic'.