Worksheet: Allergy | Biology Class 7 ICSE PDF Download

Part A: Multiple Choice Questions (MCQs)

Q1. Which scientist first introduced the term “allergy”?
a) Alexander Fleming
b) Louis Pasteur
c) Clemens von Pirquet
d) Robert Koch

Q2. Which chemical released during allergic reactions is responsible for symptoms like rashes and swelling?
a) Insulin
b) Histamine
c) Hemoglobin
d) Bile

Q3. Which of the following is a seasonal allergy trigger?
a) Milk
b) Penicillin
c) Pollen
d) Dust mites

Q4. Which of these is the most serious allergic reaction that can be life-threatening?
a) Hay fever
b) Hives
c) Anaphylaxis
d) Asthma

Q5. Which test involves pricking the skin with allergen drops to check for reactions?
a) Blood sugar test
b) Skin prick test
c) ECG test
d) Biopsy

Part B: Short Answer Questions

Q6. What is an allergy?

Q7. Name any three common allergens and the way they enter the body.

Q8. List two symptoms of food allergy and two symptoms of airborne allergy.

Q9. What is the difference between seasonal allergy and dust allergy?

Q10. How can people prevent allergic reactions?

Part C: Long Answer Questions 

Q11. Explain the role of histamine in allergic reactions.

Q12. Describe the process of allergy testing.

Q13. What is anaphylaxis? Explain its symptoms and treatment.