Infection and Response Practice Questions
GCSE · GCSE Biology · 150 free MCQs with instant results and detailed explanations.
150
Total
46
Easy
74
Medium
30
Hard
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Sample Questions from Infection and Response
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What type of pathogen causes the flu?
A.
Bacteria
B.
Virus
C.
Fungi
D.
Protozoa
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Correct Answer: B
The flu is caused by a virus, which is a type of pathogen that requires a host to replicate. Bacteria, fungi, and protozoa are other types of pathogens but do not cause the flu.
Q2
Easy
Which of the following is a method to prevent the spread of infectious diseases?
A.
Washing hands regularly
B.
Eating a balanced diet
C.
Drinking more water
D.
Taking vitamins
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Correct Answer: A
Washing hands regularly is an effective method for preventing the spread of infectious diseases as it removes pathogens from the skin. The other options are healthy practices but do not directly prevent disease transmission.
Q3
Easy
Vaccines help protect against diseases by:
A.
Increasing food intake
B.
Stimulating the immune system
C.
Directly killing pathogens
D.
Speeding up recovery from illness
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Correct Answer: B
Vaccines stimulate the immune system to recognize and fight specific pathogens without causing the disease, leading to immunity. The other options do not accurately describe how vaccines function.
Q4
Medium
What is the primary function of white blood cells in the immune system?
A.
Transport oxygen to tissues
B.
Produce hormones
C.
Defend against pathogens
D.
Digest food
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Correct Answer: C
White blood cells are crucial for the immune response as they identify and neutralize pathogens, such as bacteria and viruses. This distinguishes them from other cells that serve different functions.
Q5
Medium
Which of the following is NOT a method of transmission for infectious diseases?
A.
Airborne
B.
Direct contact
C.
Photosynthesis
D.
Vector-borne
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Correct Answer: C
Photosynthesis is a process used by plants to convert light energy into chemical energy, not a method of disease transmission. The other options describe valid ways that pathogens can spread.
Q6
Medium
Which of the following is a symptom of an allergic reaction?
A.
Fever
B.
Coughing
C.
Skin rash
D.
Headache
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Correct Answer: C
A skin rash is a common symptom of an allergic reaction, resulting from the immune system's response to allergens. The other symptoms can arise from various conditions but are not specific to allergies.
Q7
Medium
How do vaccines help in preventing infectious diseases?
A.
They kill pathogens directly.
B.
They stimulate an immune response.
C.
They provide immediate antibodies.
D.
They eliminate pathogens from the environment.
Show Answer & Explanation
Correct Answer: B
Vaccines work by stimulating the immune system to recognize and respond to specific pathogens, creating memory cells for faster response upon future exposure. They do not kill pathogens directly.
Q8
Hard
Which of the following best describes the role of T-cells in the immune response?
A.
They produce antibodies to neutralize pathogens.
B.
They directly attack and destroy infected cells.
C.
They enhance the activity of B-cells.
D.
They trap and engulf pathogens.
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Correct Answer: B
T-cells are primarily responsible for directly attacking and destroying infected cells, particularly those infected by viruses, which distinguishes them from B-cells that produce antibodies.
Q9
Hard
A patient receives a vaccine that contains inactivated pathogens. What type of immunity does this primarily provide?
A.
Passive immunity
B.
Active immunity
C.
Natural immunity
D.
Cell-mediated immunity
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Correct Answer: B
Vaccines that contain inactivated pathogens stimulate the body's immune system to generate an active immune response, leading to the production of memory cells and antibodies, which qualifies as active immunity.
Q10
Hard
Which of the following best describes the role of antigens in the immune response?
A.
They are produced by pathogens to evade the immune system.
B.
They are molecules that trigger an immune response when recognized as foreign.
C.
They are antibodies that neutralize toxins in the body.
D.
They are enzymes that break down bacteria in the bloodstream.
Show Answer & Explanation
Correct Answer: B
Antigens are substances that the immune system recognizes as foreign, leading to an immune response, including the production of antibodies. This contrasts with the other options, which inaccurately describe the roles of antigens or related components.
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Infection and Response — GCSE GCSE Biology Practice Questions Online
This page contains 150 practice MCQs for the chapter Infection and Response in GCSE GCSE Biology. The questions are organized by difficulty — 46 easy, 74 medium, 30 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.