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CAIE A-Level Biology AS 8.2.1 Red Blood Cell Roles in O2 and Co2 Transport Questions

Explain red blood cell roles in oxygen and carbon dioxide transport using evidence from each question and mark scheme.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • Explain red blood cell roles in oxygen and carbon dioxide transport.

CAIE A-Level Biology AS 8.2.1 Red Blood Cell Roles in O2 and Co2 Transport Questions question 1

[Maximum number: 2]

Control of heartbeat is myogenic. This means the electrical activity controlling the rhythm of a regular heartbeat begins in the heart muscle itself.

Atrial fibrillation (AF) is an abnormal heart rhythm that causes rapid and irregular contractions of the atria. Untreated cases of AF can lead to a stroke.

Red blood cells are involved in the transport of oxygen and carbon dioxide in the blood.

Fig. 5.1 is a diagram representing the exchange of oxygen and carbon dioxide between a red blood cell in a capillary and a respiring cell. Some of the reactions that take place in the red blood cell are also shown. The diagram is not drawn to scale.

Fig. 5.1

Fig. 5.1

Identify enzyme X and molecule Y in Fig. 5.1.

X

Y

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