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UPSC 2010: Excessive release of the pollutant carbon monoxide (CO) into the air may produce a condition in which oxygen supply in the human body decreases. What causes this condition ?
(a)When inhaled into the human body, CO is converted into CO₂
(b)The inhaled CO has much higher affinity for haemoglobin as compared to oxygen
(c)The inhaled CO destroys the chemical structure of haemoglobin
(d)The inhaled CO adversely affects the respiratory centre in the brain
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Not attemptedCorrect Answer: (b) The inhaled CO has much higher affinity for haemoglobin as compared to oxygen
Carbon monoxide binds to haemoglobin with roughly 200–300 times the affinity of oxygen, forming carboxyhaemoglobin and blocking oxygen transport; this high affinity—not conversion to CO₂ or neural effects—is what produces hypoxia. ([ncbi.nlm.nih.gov](https://www.ncbi.nlm.nih.gov/books/NBK539815/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2010 Science & Technology question?▼
The correct answer is option (b): The inhaled CO has much higher affinity for haemoglobin as compared to oxygen. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Health & Diseases question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2010, GS Paper 1, as Question 126. It falls under Science & Technology > Health & Diseases.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Health & Diseases?▼
UPSC has asked 86 questions from Health & Diseases (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.