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DSE Biology: Health and Disease — Practice Questions & Answers
The components of a healthy lifestyle, the nature and spread of infectious disease, how the body defends itself, and the causes and control of non-infectious disease and drug misuse.
168 practice questions available for this topic — here are 10 with full answers and explanations.
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Practice questions with answers
1
Multiple choice · Easy
Which of the following belongs to the humoral immune response?
production of antibodies
blood clotting
phagocytosis of pathogens
production of memory T cells
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Why The humoral response is the production of antibodies.
2
Multiple choice · Medium
After an injury, the wound usually becomes swollen due to
accumulation of tissue fluid at the wound
accumulation of bacteria at the wound
increased phagocytosis at the wound
decreased blood flow to the wound
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Why Swelling is caused by accumulation of tissue fluid at the wound.
3
Multiple choice · Hard
Antibodies provide specific immunity because each antibody
binds to one particular antigen
engulfs all pathogens
is produced by red blood cells
acts as an antibiotic
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Why Each antibody binds to one particular antigen.
4
Fill in the blank · Medium
Specific proteins released by lymphocytes that bind to antigens are called
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Answer:
antibodies / antibody
Why Antibodies bind antigens.
5
Fill in the blank · Medium
The immune response that involves the production of antibodies by lymphocytes is the
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Answer:
humoral
Why The humoral response produces antibodies.
6
Fill in the blank · Medium
A surface molecule of a pathogen that is recognised by lymphocytes and triggers antibody production is an
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Answer:
antigen
Why Antigens trigger antibody production.
7
Multiple choice · Easy
Which description about antibiotics is correct?
antibiotics can be produced by fungi
antibiotics can engulf pathogens
antibiotics can bind to specific antigens
antibiotics are produced by lymphocytes
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Why Some antibiotics are produced naturally by fungi.
8
Multiple choice · Medium
Why are antibiotics ineffective against the common cold?
the cold is caused by a virus, which antibiotics do not affect
the cold is caused by fungi
antibiotics only kill body cells
the dose used is always too small
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Why The common cold is caused by a virus, and antibiotics act only on bacteria.
9
Multiple choice · Hard
Repeated and incomplete courses of antibiotics encourage antibiotic resistance because they
select for resistant bacteria that survive and multiply
create new resistance genes in the patient
turn viruses into bacteria
increase the number of antibodies
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Why Sub-lethal use kills susceptible bacteria but selects resistant survivors that then multiply.
10
Fill in the blank · Medium
Antibiotics are chemicals that kill or inhibit the growth of
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Answer:
bacteria
Why Antibiotics act on bacteria.
Key terms in Health and Disease
Health: A state of complete physical, mental and social well-being.
Disease: A disorder that affects the normal functioning of the body.
Pathogen: A microorganism that causes an infectious disease.
Infectious disease: A disease caused by a pathogen that can be transmitted from one person to another.
Antigen: A foreign molecule, often on a pathogen's surface, that triggers an immune response.
Antibody: A protein produced by lymphocytes that binds specifically to an antigen to help destroy a pathogen.
Phagocyte: A type of white blood cell that engulfs and digests pathogens.
Lymphocyte: A type of white blood cell that produces antibodies against specific antigens.
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