Drugs — Paper 2 · IGCSE Biology (9-1) 0970

27 Which hormone may be used to improve sporting performance? A FSH B LH C oestrogen D testosterone

1 marks

Answer: D

This question in 0970/21 May/June 2018

26 The graph shows the number of cases of MRSA in one country between 2001 and 2006. 8000 7250 number of cases of 6500 MRSA 5750 5000 2001 2002 2003 2004 2005 2006 year Between which years was the greatest change in the number of cases of MRSA seen? A 2002 and 2003 B 2003 and 2004 C 2004 and 2005 D 2005 and 2006

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2018

28 The diagram represents a synapse in the brain involved in the perception of pain. Which labelled molecule represents heroin? A B C D

1 marks

Answer: A

This question in 0970/21 May/June 2019

28 The diagram shows a synapse. Heroin affects the neurone. Which labelled part does the heroin directly affect? direction of A movement of impulse B C D

1 marks

Answer: C

This question in 0970/22 May/June 2019

35 When antibiotics are overused they become less effective. Which statement is correct? A Artificial selection results in resistant strains of bacteria. B Patients become resistant to the antibiotic. C The antibiotic causes the bacteria to mutate. D The antibiotic does not kill resistant bacteria.

1 marks

Answer: D

This question in 0970/22 May/June 2019

39 Evidence shows that some aquatic organisms have been feminised. What is the most likely cause of this? A increased nitrates running off farmland into the rivers B female hormones excreted by women taking contraceptive pills C infectious diseases in the fish D decreasing levels of oxygen in the rivers

1 marks

Answer: B

This question in 0970/22 May/June 2019

17 Which factor increases the risk of developing coronary heart disease? A low fat diet B regular exercise C relaxation D smoking

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2019

26 Bacteria such as MRSA are resistant to antibiotics. These processes can occur in bacteria. 1 artificial selection 2 genetic variation 3 mutation 4 natural selection What would contribute to the development of antibiotic resistance? A 1, 2, 3 and 4 B 1, 2 and 3 only C 2, 3 and 4 only D 2 and 4 only

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2019

27 Why do some athletes take anabolic steroids? A to decrease blood glucose concentration B to increase muscle mass C to kill bacteria D to reduce aggression

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2019

27 The statements are about the use of antibiotics. 1 using an antibiotic to prevent infection 2 using an antibiotic known to kill the bacteria causing an infection 3 using an antibiotic only when essential 4 using an antibiotic to treat a viral infection Which practices will increase the chance of the development of antibiotic resistance in bacteria? A 1, 2, 3 and 4 B 1 and 4 only C 2 and 3 only D 2 and 4 only

1 marks

Answer: B

This question in 0970/21 May/June 2020

26 Which characteristic of viruses prevents them from being affected by antibiotics? A They cannot reproduce on their own. B They contain DNA or RNA. C They have no cell structure. D They are much smaller than bacteria.

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2020

28 Which hormone is used in contraceptive pills? A insulin B LH C FSH D progesterone

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2020

40 The hormones from the female contraceptive pill can pollute water courses. What effect do they have? A decrease the amount of oxygen for fish B decrease the sperm count of men C increase the growth of producers D increase the number of decomposers

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2020

29 Scientists carried out a survey on the effect of giving up smoking on the risk of developing lung cancer. The results are shown in the graph. continued smoking 15 percentage 10 cumulative risk of developing lung cancer stopped smoking at 60 years of age 5 stopped smoking at 30 years of age never smoked 0 45 55 65 75 age, in years, of people surveyed The scientists made three conclusions: 1 Stopping smoking reduces the risk of developing lung cancer. 2 Age increases the risk of lung cancer for smokers and non-smokers. 3 The earlier people stop smoking, the lower the risk. Which conclusions are correct? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: A

This question in 0970/21 May/June 2021

29 The graph shows how smoking different numbers of cigarettes for different lengths of time affects the risk of lung cancer. 45 key 40 smoking less than 20 cigarettes per day 35 smoking more than 20 cigarettes per day 30 risk of lung cancer 25 / arbitrary units 20 15 10 5 0 < 20 20–29 30–39 40–49 > 50 number of years smoking Which conclusions are supported by the data in the graph? 1 Smoking more than 20 cigarettes per day always increases the risk of lung cancer more than smoking less than 20 cigarettes per day. 2 Smoking cigarettes for more years increases the risk of lung cancer. 3 Smoking more than 20 cigarettes per day for more than 50 years has the highest risk of lung cancer. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: D

This question in 0970/22 May/June 2021

39 What is a reason for conserving plant species? A to absorb oxygen from the air B to decrease rainfall C to obtain drugs for medicinal use D to release carbon dioxide into the air

1 marks

Answer: C

This question in 0970/21 May/June 2022

27 What is the definition of a drug? A a substance produced by a gland that is carried in the blood and alters the activity of target organs B a substance produced by white blood cells that is carried in the blood and destroys bacteria and viruses C a substance taken into the body that modifies or affects chemical reactions carried out in the body D a substance that increases the rate of chemical reactions in the body and is not changed by the reaction

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2022

28 What is defined as a substance that is taken into the body and modifies or affects chemical reactions in the body? A antibody B drug C hormone D pathogen

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2023

29 Which statement about antibiotics is correct? A Antibiotics do not affect bacteria but kill viruses. B Antibiotics do not affect bacteria or viruses. C Antibiotics kill bacteria and kill viruses. D Antibiotics kill bacteria but do not affect viruses.

1 marks

Answer: D

This question in 0970/21 May/June 2024

26 Which statement describes the effect of antibiotics? A Antibiotics do not affect bacteria or viruses. B Antibiotics kill bacteria but do not affect viruses. C Antibiotics kill both bacteria and viruses. D Antibiotics kill viruses but do not affect bacteria.

1 marks

Answer: B

This question in 0970/21 May/June 2025

22 Which action would help to limit the development of antibiotic resistance in bacteria? A Use antibiotics frequently to prevent infection by antibiotic-resistant bacteria. B Use antibiotics only to treat bacterial infections. C Use antibiotics to treat all types of infections. D Use antibiotics to treat only viral infections.

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2025