CAIE IGCSE Biology 10 Diseases and Immunity Questions

Practise identifying pathogens, tracing disease transmission and explaining body defences, immunity and disease control.

Covered syllabus points

[Maximum number: 1]

Campylobacter is a bacterium that can cause food poisoning.

Which word describes Campylobacter?

antibody

disease

pathogen

symptom

[Maximum number: 2]

Rubella and kwashiorkor are two diseases that affect children.

Rubella is a transmissible disease and kwashiorkor is a non-transmissible disease.

Define the term transmissible disease.

[Maximum number: 1]

By which route would an HIV infection not be transmissible?

blood

saliva

sharing needles for injections

semen

[Maximum number: 11]

Fig. 6.1 is a diagram of the virus that causes measles.

Fig. 6.1

(a)

Viruses and some bacteria are pathogenic. Diseases caused by pathogens are transmissible.

[ 4 ]

(i)

State two ways that a pathogen can be transmitted indirectly.

[ 2 ]

(ii)

The body has barriers to defend itself against pathogens.

State two mechanical barriers of the body.

[ 2 ]

(b)

Some white blood cells produce antibodies as part of the body's defence against pathogens.

Describe the role of antibodies in defence of the body.

[ 4 ]

(c)

The immunity gained after infection by a pathogen is active immunity.

Explain how active immunity differs from passive immunity.

[ 3 ]

All question bank results loaded