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Paper 1 H - SAMPLE SET 1 Q11 Answers

11) Monoclonal antibodies are used to measure the levels of hormones in the blood.
Pregnant women produce the hormone HCG.
​HCG is excreted in urine.
​Figure 8 shows four pregnancy test strips.
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11.1) Which test strip shows a negative test result? [1 mark]
​Tick one box.
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11.2) Monoclonal antibodies are used for pregnancy testing.
Give one other use of monoclonal antibodies. [1 mark]

11.3) Figure 9 shows the parts of a pregnancy test strip.
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The pregnancy test strip will show a positive test result when a woman is pregnant.
Explain how the pregnancy test strip works to show a positive result. [6 marks]
​
​​​​​​​​​(Total for Question 11 = 8 marks)

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