In blood, oxygen is mainly carried by binding with what?
Answer and explanation
Correct answer: Haemoglobin
Most oxygen in human blood is transported by binding reversibly to haemoglobin, the iron-containing respiratory pigment present in red blood cells. In the lungs, haemoglobin combines with oxygen to form oxyhaemoglobin; in tissues, oxygen is released for respiration. Therefore option A is correct. Saliva and bile aid digestion, while urea is a nitrogenous waste, not an oxygen carrier.
Frequently asked questions
What is the correct answer to this question?
Haemoglobin
Why is this the correct answer?
Most oxygen in human blood is transported by binding reversibly to haemoglobin, the iron-containing respiratory pigment present in red blood cells. In the lungs, haemoglobin combines with oxygen to form oxyhaemoglobin; in tissues, oxygen is released for respiration. Therefore option A is correct. Saliva and bile aid digestion, while urea is a nitrogenous waste, not an oxygen carrier.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Life Processes. Topic: Transportation.
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