CAIE IGCSE Biology 15.1.1 Defining a Drug
Practise defining a drug as a substance taken into the body that modifies or affects its chemical reactions.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- state that a drug is any substance taken into the body
- complete the definition by stating that it modifies or affects chemical reactions in the body
- distinguish the drug definition from definitions of hormones, enzymes and antibodies
15.1.1—Drug as any substance taken into question 1
[Maximum number: 2]
Heroin is a drug that acts on the nervous system.
Define the term drug.
any, chemical / substance, taken into / AW, the body ;
modifies / affects / changes / AW, (chemical) reactions / metabolism ;
I behaviour
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