Immunity — KCSE Biology

KCSE Biology · 91 practice questions · 2 syllabus objectives

32 easy28 medium31 hard

What You'll Learn

Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.

Define immunity and distinguish between natural and acquired immunity

Describe the role of white blood cells in the immune response

Sample Questions

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easySHORT ANSWER4 marks

Explain how white blood cells can remember past infections and state its significance. (4 marks)

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Part (a) — 2 marks

Memory cells remain in the body after an infection has been cleared (1 mk)

They can quickly respond to the same pathogen if it re-enters the body (1 mk)

Part (b) — 2 marks

Allows for a faster and more effective immune response upon re-infection (1 mk)

Reduces the severity of illness during subsequent infections (1 mk)

easySHORT ANSWER4 marks

State the role of white blood cells in combating infections and give two examples. (4 marks)

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Part (a) — 2 marks

White blood cells identify and destroy pathogens (1 mk)

They coordinate the immune response to eliminate infections (1 mk)

Part (b) — 2 marks

Influenza (flu) (1 mk)

Tuberculosis (1 mk)

easySHORT ANSWER4 marks

Name two types of white blood cells involved in the immune response and describe their main functions. (4 marks)

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Part (a) — 2 marks

Lymphocytes (1 mk)

Phagocytes (1 mk)

Part (b) — 2 marks

Lymphocytes produce antibodies to neutralise pathogens (1 mk)

Phagocytes engulf and digest pathogens through phagocytosis (1 mk)

Explain the role of antibodies in acquired immunity. (4 marks)

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Why Practise Immunity?

KNEC Aligned

Questions match the KCSE syllabus objectives and exam format exactly.

Detailed Marking Schemes

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Immunity — KCSE Biology

What You'll Learn

Sample Questions

+88 More Questions

Why Practise Immunity?

KNEC Aligned

Detailed Marking Schemes

Track Your Mastery

Master Immunity for KCSE