CAPE Biology Unit 1 · 2007 · Paper 2 · Question 5(a)
Describe the structure of the membrane of a typical cell, and identify its component parts and their biochemical nature.
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- 5(b)(i)Entry of useful minerals, such as potassium[8 marks]
- 5(b)(ii)Absorption of large molecules by endocytosis[1 mark]
- 5(b)(iii)Entry of non-ionic molecules such as sucrose[1 mark]
- 5(b)(iv)Prevention of entry of toxic molecules such as copper or lead[1 mark]
- 5(c)When strips of potato tissue are immersed in distilled water for two hours, they increase in length and become turgid. Relate this outcome to the exact causes…[6 marks]
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