Question

Assertion: 100 ml of blood delivers 5 ml oxygen to tissues in normal conditions
Reason : One molecule of Hb can bind with 4 molecules of oxygen

• A. Both assertion and reason are true and reason is the correct explanation of assertion
• B. Both assertion and reason are true but reason is not the correct explanation of assertion
• C. Assertion is true but reason is false
• D. Both assertion and reason are false

Answer 1

The correct option is B Both assertion and reason are true but reason is not the correct explanation of assertion

One molecule of haemoglobin can bind 4 molecules of oxygen. This represents the oxygen carrying capacity of blood and not the amount of oxygen delivered to the tissues which is determined by the partial pressure difference of oxygen between the tissue and the blood.