Biology 9700: GAS EXCHANGE AND SMOKING Topical Past Paper Questions
Cambridge AS & A Level Biology (9700) past-paper questions on GAS EXCHANGE AND SMOKING, free. This topic is frequently examined across 28 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
Lipids, proteins and polysaccharides are biological molecules that can be described as macromolecules. (a) Explain why lipids, proteins and polysaccharides can be described as macromolecules, but only proteins and polysaccharides can be described as polymers. [2] (b) Table 6.1 li…
In mammals, the gas exchange system includes a set of branching airways that carry air to and from the gas exchange surface. Air from the external atmosphere passes through different types of airway to reach the gas exchange surface. (a) Name the type of airway of the gas exchang…
Which statements about the function of tissues found in the human gas exchange system are correct? 1 Collagen in the bronchi prevents them collapsing. 2 Smooth muscle in the bronchioles can contract to increase the flow of air into the alveoli. 3 Elastic fibres in the alveoli str…
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