O-LevelBiologyTransport in Humans5090/11 · Oct/Nov 2018 · Q151 Mark

The diagram shows chemicals being exchanged between some cells and a blood capillary. [Figure showing a blood capillary with chemicals P moving out of the capillary and Q moving into the capillary] What could be the identities of chemicals P and Q?

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AP amino acids and oxygen, Q carbon dioxide and maltose

BP carbon dioxide and glucose, Q alcohol and oxygen

CP carbon dioxide and urea, Q oxygen and protein

DP glucose and oxygen, Q carbon dioxide and water

✓ Correct answer

D: P glucose and oxygen, Q carbon dioxide and water

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Topic: Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2018 Paper 1 Variant 1, question 15.

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