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2 marksCellular Transport Mechanisms

CSEC Human and Social Biology · May/June 2016 · Paper 2 · Question 2(b)(i)

Figure 1 and Figure 2 show experimental setups demonstrating the movement of molecules.

Suggest TWO differences between the movement of molecules illustrated in Figure 1 and Figure 2.

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Other parts of this question

  1. 2(a)State the meaning of the terms diffusion and osmosis.[4 marks]
  2. 2(b)(ii)Identify whether osmosis is taking place in Figure 1 or Figure 2.[1 mark]
  3. 2(b)(iii)State what would happen to the water level in the beaker in Figure 2 after one hour, and explain why.[2 marks]
  4. 2(c)(i)State TWO organs in the human body, other than the small intestine, in which diffusion occurs.[2 marks]
  5. 2(c)(ii)Describe and explain the structure and function of the villus in the small intestine.[4 marks]

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