CIE iGCSE Co-Ordinated Science B14. Drugs Exam Style Questions Paper 2
▶️ Answer/Explanation
Carbon monoxide reduces the oxygen-carrying capacity of blood rather than being addictive.
Nicotine is the addictive component of tobacco smoke, not a carcinogen.
Smoke particles and tar together are linked to lung damage, with tar specifically identified as a carcinogen that can cause cancer.
✅ Answer: (D)
Nicotine is the addictive component of tobacco smoke, not a carcinogen.
Smoke particles and tar together are linked to lung damage, with tar specifically identified as a carcinogen that can cause cancer.
✅ Answer: (D)
▶️ Answer/Explanation
Carbon monoxide binds to haemoglobin in red blood cells much more strongly than oxygen does, forming carboxyhaemoglobin.
This permanently blocks that haemoglobin from carrying oxygen, reducing the oxygen-carrying capacity of the blood.
Nicotine is addictive, and tar is carcinogenic, but neither directly reduces oxygen transport in the way carbon monoxide does.
✅ Answer: (B)
This permanently blocks that haemoglobin from carrying oxygen, reducing the oxygen-carrying capacity of the blood.
Nicotine is addictive, and tar is carcinogenic, but neither directly reduces oxygen transport in the way carbon monoxide does.
✅ Answer: (B)