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Introduction to the lesson
You have learned many new, important concepts in this chapter. Now it is time to test your ability to answer the past paper questions on cell membranes. As has been explained, we cannot reproduce the questions but here are links to the papers on the Cambridge International website and a list of the questions that deal with the material from chapter 4.
Exam practice #4
Answer the following questions from these papers. Remember to check your answers in the mark schemes.