Free AQA GCSE Combined Science: Synergy (8465) Exam Questions and Answers

Figure 1 shows a doctor testing a reflex action of a patient. When the doctor touches the patient's foot with a blunt rod, the patient's toes curl. Where are the receptors in this reflex action? Tick (✓) one box.

• AA. In the brain
• BB. In the foot
• CC. In the leg

Figure 1 shows a doctor testing a reflex action of a patient. When the doctor touches the patient's foot with a blunt rod, the patient's toes curl. What is the coordinator in this reflex action? Tick (✓) one box.

• AA. The blunt rod
• BB. The central nervous system
• CC. The sensory neurone

Figure 1 shows a doctor testing a reflex action of a patient. When the doctor touches the patient's foot with a blunt rod, the patient's toes curl. What is the response in this reflex action? Tick (✓) one box.

• AA. Feeling the blunt rod
• BB. The blunt rod touching the skin
• CC. The toes curling

Muscle cells use oxygen for respiration. Explain why muscle cells need to respire.

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Fatty material can build up in coronary arteries. The flow of blood through coronary arteries may be reduced. Which organ contains coronary arteries?

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Fatty material can build up in coronary arteries. The flow of blood through coronary arteries may be reduced. There are different treatments for coronary diseases. Draw one line from each treatment to how the treatment works. Treatment: Replacement valve; Statin; Stent How the treatment works: Keeps coronary arteries open; Makes sure blood flows in one direction; Reduces blood cholesterol concentration; Reduces blood glucose concentration

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Some medical drugs can be produced using genetically modified (GM) bacteria. How are GM bacteria produced? Tick (✓) one box.

• AA. All genes are removed from the bacteria.
• BB. Bacteria are grown in a solution of the drug.
• CC. Genes are transferred into the bacteria.

What is one benefit of producing drugs using GM bacteria? Tick (✓) one box.

• AA. Large quantities of the drug can be produced.
• BB. Non-GM bacteria live longer than GM bacteria.
• CC. The GM bacteria that produce the drug are very infectious.

Scientists are investigating the production of organs from GM animals for transplanting into humans. What is an advantage of using organs from GM animals compared with using organs from human donors? Tick (✓) one box.

• AA. Organs from GM animals are less likely to be rejected by the human immune system.
• BB. Organs from GM animals are not likely to function correctly.
• CC. There are more human donors than the number of people who need a transplant.

Scientists are investigating the production of organs from GM animals for transplanting into humans. Suggest one reason why some people disagree with the use of GM animals.

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