Science — AI-generated practice question

Transport of Oxygen:
Oxygen is carried by the red blood corpuscles (RBCs), which contain the pigment haemoglobin. Haemoglobin binds with oxygen in the lungs to form oxyhaemoglobin and releases it to the body cells.

Transport of Carbon dioxide:
Carbon dioxide is transported in dissolved form in the plasma. It diffuses from body cells into the blood and is carried to the lungs, where it is expelled during exhalation.

Both gases are transported through the circulatory system (heart, blood, and blood vessels).

Source: Chapter 5 – Life Processes, Section 5.4.1 Transportation in Human Beings

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• Examiners expect you to clearly distinguish between the two gases: O₂ by RBCs/haemoglobin, CO₂ dissolved in plasma.
• Mentioning haemoglobin by name scores a mark.
• Briefly linking to the circulatory system shows understanding of the broader context.
• Avoid confusing "plasma" (liquid part of blood) with "blood" in general — be precise.