2. a) The graph in Figure 3 represents the information complied over a 10-year period showing the development of the human immunodeficiency virus (HIV) and the changes in the number of T4 lymphocytes. Key HIV --- T4 cells 1 2 4 6 10 Time/years FIGURE 3 (a)(i) Explain the differences seen in the graph between the numbers of T4 cells and HIV particles over the 10-year period. (ii) Suggest why suffers with AlIDS may contract Tuberculosis (TB), even though they have been vaccinated against it. Number of T4 cells (lymphocytes in blood) 9 Number of HIV particles
2. a) The graph in Figure 3 represents the information complied over a 10-year period showing the development of the human immunodeficiency virus (HIV) and the changes in the number of T4 lymphocytes. Key HIV --- T4 cells 1 2 4 6 10 Time/years FIGURE 3 (a)(i) Explain the differences seen in the graph between the numbers of T4 cells and HIV particles over the 10-year period. (ii) Suggest why suffers with AlIDS may contract Tuberculosis (TB), even though they have been vaccinated against it. Number of T4 cells (lymphocytes in blood) 9 Number of HIV particles
Chapter15: Feed And Protect Me
Section: Chapter Questions
Problem 1M
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