Paper 1 H - SAMPLE SET 1 Q4
4) Statins are drugs used to treat coronary heart disease (CHD).
New drugs must be trialled before they can be licensed for use.
Some scientists trialled two different types of statin.
The scientists:
4.1) During the trials the statins are tested for side effects.
Give two other reasons why the statins are trialled before use. [2 marks]
1. _____________________________
2. _____________________________
4.2) Describe how the double-blind method is used in this trial. [2 marks]
4.3) The results of drug trials are peer reviewed before they are published.
Why are peer reviews important in drug trials? [1 mark]
Tick one box.
New drugs must be trialled before they can be licensed for use.
Some scientists trialled two different types of statin.
The scientists:
- conducted the trial on 325 patients with a history of CHD in their family
- used a double-blind trial method
- measured the change in blood cholesterol levels over two years
- measured the change in thickness of an artery wall over two years.
4.1) During the trials the statins are tested for side effects.
Give two other reasons why the statins are trialled before use. [2 marks]
1. _____________________________
2. _____________________________
4.2) Describe how the double-blind method is used in this trial. [2 marks]
4.3) The results of drug trials are peer reviewed before they are published.
Why are peer reviews important in drug trials? [1 mark]
Tick one box.
Table 2 shows the results of the trial.
4.4) Drug A is more effective than Drug B.
Give two reasons that support this conclusion.
Use information from Table 2. [2 marks]
1. _____________________________
2. _____________________________
4.5) A scientist concludes that Drug A is a safer drug than Drug B.
Give two reasons why this is not a valid conclusion. [2 marks]
(Total for Question 4 = 9 marks)
Give two reasons that support this conclusion.
Use information from Table 2. [2 marks]
1. _____________________________
2. _____________________________
4.5) A scientist concludes that Drug A is a safer drug than Drug B.
Give two reasons why this is not a valid conclusion. [2 marks]
(Total for Question 4 = 9 marks)