ExpertEasy1 markMultiple Choice
AQA GCSE · Question 04.9 · Infection and Response
Which athlete has tested positive for anabolic steroids in their urine?
Which athlete has tested positive for anabolic steroids in their urine?
Answer options:
A.
A
B.
B
C.
C
D.
D
How to approach this question
A positive result requires two blue lines: one in the control area (to show the test is valid) and one in the test area (to show the steroid is present). Identify which athlete's test strip shows both of these lines.
Full Answer
C.C✓ Correct
C
To interpret the results:
* **Control Line (top):** Must be present for the test to be valid.
* **Test Line (bottom):** Only appears if the substance (anabolic steroid) is present.
* **Athlete A & D:** Control line is present, test line is absent. This is a **valid negative** result.
* **Athlete B:** Control line is absent. This is an **invalid** test.
* **Athlete C:** Control line is present AND test line is present. This is a **valid positive** result.
Therefore, athlete C is the one who has tested positive.
Common mistakes
✗ Choosing B, which is an invalid test, not a positive one.
✗ Choosing A or D, which are negative results.
Practice the full AQA GCSE Biology Higher Tier Paper 1
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