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Describe the mode of action of antiretroviral drug such as zidovudine against HIV. [4 marks]

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Describe the mode of action of antiretroviral drug such as zidovudine against HIV. [4 marks]

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A student used the data in Fig. 4.2 below to predict  that measures used to control the spread of HIV will decrease the number of deaths from TB. Discuss whether the data in FIg. 4.2 supports this prediction. [3 marks]

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A student used the data in Fig. 4.2 below to predict  that measures used to control the spread of HIV will decrease the number of deaths from TB. Discuss whether the data in FIg. 4.2 supports this prediction. [3 marks]

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Describe how Vibrio cholera affects the intestines resulting in the excessive loss of water from the body. [4 marks]

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Describe how Vibrio cholera affects the intestines resulting in the excessive loss of water from the body. [4 marks]

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Write four recommendations that can be advised to a person who is traveling to a region where cholera disease is common. [4 marks]

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Write four recommendations that can be advised to a person who is traveling to a region where cholera disease is common. [4 marks]

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Describe in detail the mode of action of penicillin on bacteria cells. (how it kills bacteria) [5 marks]

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Describe in detail the mode of action of penicillin on bacteria cells. (how it kills bacteria) [5 marks]

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Describe how bacteria becomes resistant to a B-lactam antibiotic such as penicillin. [4 marks]

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Describe how bacteria becomes resistant to a B-lactam antibiotic such as penicillin. [4 marks]

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Based on the graph below, suggest explanations for the decrease in the number of people newly infected with HIV. [3 marks]

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Based on the graph below, suggest explanations for the decrease in the number of people newly infected with HIV. [3 marks]

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The image below shows the global distribution of Malaria. Unlike Malaria, TB is found all over the world. Explain why Malaria shows distribution pattern in the map but TB is found everywhere. [4 marks]

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The image below shows the global distribution of Malaria. Unlike Malaria, TB is found all over the world. Explain why Malaria shows distribution pattern in the map but TB is found everywhere. [4 marks]