Established 2026 · Free Educational Resources for All

Biology · 100-Mark Comprehensive Assessment

Biology Comprehensive Practice Test 4

A 100-mark Biology assessment covering 0-0-7 — Microorganisms, Disease & the Human Immune System, 0-0-8 — DNA, Genes, Chromosomes & Heredity — progressing from foundational knowledge to application, analysis and higher-order reasoning.

EDUSAMBAM Editorial Team·45 questions · 100 marks·Basic → Advanced

Questions

100

Marks

Sections

100%

Auto-Graded

A — Multiple Choice	15	2	30
B — True / False	10	2	20
C — Fill in the Blank	10	2	20
D — Column Matching	5 pairs	2	10
E — Short Answer	5	4	20
Total	45	—	100
Total	45	—	100

Fill-in-the-blank and short-answer questions are checked automatically against accepted answers — exact wording does not need to match, but the key term should be present.

0 of 45 answered

0/100

You scored 0%

Keep practicing

Section A — Multiple Choice

30 marks

15 questions · 2 marks each.

1.Bacteria are generally classified as:Basic2 pts

A. Prokaryotic cells

B. Eukaryotic animals

C. Viruses with nuclei

D. Multicellular fungi

2.Viruses are best described as:Basic2 pts

A. Acellular infectious agents that depend on host cells for replication

B. Independent cells with ribosomes

C. Photosynthetic bacteria

D. Multicellular parasites

3.A pathogen is:Basic2 pts

A. An agent capable of causing disease

B. Any harmless microorganism

C. A white blood cell

D. A vaccine ingredient in every case

4.A common route by which respiratory pathogens spread is:Basic2 pts

A. Respiratory droplets or aerosols

B. DNA inheritance only

C. Photosynthesis

D. Bone growth

5.Which is a key function of mucus and cilia in airways?Basic2 pts

A. Trapping and moving particles away from deeper tissues

B. Producing antibodies directly

C. Digesting red blood cells

D. Making ATP in alveoli

6.Phagocytes contribute to defence by:Intermediate2 pts

A. Engulfing and digesting microbes or debris

B. Producing red blood cells

C. Making insulin

D. Carrying oxygen with haemoglobin

7.A major advantage of adaptive immunity is:Intermediate2 pts

A. Specificity and memory

B. Complete absence of inflammation

C. No need for immune cells

D. Permanent protection against every pathogen

8.Antibodies can help defend against pathogens by:Intermediate2 pts

A. Binding specific antigens and interfering with pathogens or marking them for other immune mechanisms

B. Replacing antibiotics in every infection

C. Destroying every cell in the body

D. Changing bacterial DNA directly

9.Vaccination is a form of:Intermediate2 pts

A. Immune priming that can establish memory

B. Antibiotic treatment

C. Passive breathing exercise

D. Cellular respiration

10.Antibiotic resistance is a concern because:Intermediate2 pts

A. Drug-resistant bacteria can survive treatment and spread

B. Bacteria stop evolving

C. Antibiotics make viruses bacterial

D. Resistance always disappears after one generation

11.Which sequence best represents an infection process?Advanced2 pts

A. Entry → replication/colonisation → host response → possible transmission

B. Vaccination → photosynthesis → reproduction

C. Digestion → mutation → bone formation

D. Cell division → respiration → sunlight

12.A fever can be part of:Advanced2 pts

A. The body's regulated immune response to infection

B. Only genetic inheritance

C. Only a fungal life cycle

D. A complete absence of inflammation

13.Which statement about normal microbiota is most accurate?Advanced2 pts

A. Many microorganisms associated with the body are harmless or beneficial, though context can matter

B. All microbes are pathogens

C. Microbiota are always viruses

D. Normal microbiota never interact with immunity

14.An immune disorder can result from:Advanced2 pts

A. Excessive, misdirected or insufficient immune function

B. Only bacterial reproduction

C. Only lack of oxygen

D. Only a high-fat diet

15.The strongest way to understand host–pathogen interaction is to consider:Advanced2 pts

A. Pathogen traits, host barriers, immune responses, transmission and environmental context together

B. Only the pathogen name

C. Only antibody concentration

D. Only the temperature

Section B — True / False

20 marks

10 questions · 2 marks each.

16.All microorganisms cause disease.Basic2 pts

True

False

17.Some bacteria are beneficial to humans and ecosystems.Basic2 pts

True

False

18.Viruses generally require host cells to reproduce.Basic2 pts

True

False

19.A pathogen must always cause symptoms immediately after entering a host.Basic2 pts

True

False

20.Phagocytosis is a form of cellular engulfment.Basic2 pts

True

False

21.Antibodies recognise targets with specificity.Intermediate2 pts

True

False

22.Vaccines eliminate all pathogens from the environment.Intermediate2 pts

True

False

23.Antimicrobial resistance can make infections harder to treat.Advanced2 pts

True

False

24.The immune system includes physical barriers as well as specialised cells and molecules.Advanced2 pts

True

False

25.Transmission depends only on the pathogen and never on host or environmental factors.Advanced2 pts

True

False

Section C — Fill in the Blank

20 marks

10 questions · 2 marks each. Type the missing word or term.

26.A microorganism capable of causing disease is a ______.Intermediate2 pts

27.Viruses are generally described as ______ because they lack cellular organisation.Intermediate2 pts

28.Bacteria are ______ organisms.Intermediate2 pts

29.Cells that engulf particles and microbes are called ______.Intermediate2 pts

30.A molecule recognised by a specific immune receptor is an ______.Intermediate2 pts

31.Proteins that specifically bind antigens are called ______.Advanced2 pts

32.A population of microorganisms living in or on the body can form the normal ______.Advanced2 pts

33.The spread of a pathogen from one host to another is called ______.Advanced2 pts

34.Reduced susceptibility of a microorganism to a drug is called antimicrobial ______.Advanced2 pts

35.The body's first physical barriers include skin and ______ membranes.Advanced2 pts

Section D — Column Matching

10 marks

Use the ▲ ▼ buttons to reorder Column B until each row lines up with the correct term in Column A. 2 marks per correct pair.

36–40.Match each term in Column A with the correct description in Column B.Advanced10 pts

Column A

Bacterium

Virus

Phagocyte

Antibody

Vaccine

Column B

B. Acellular infectious agent

C. Engulfs particles or microbes

D. Specific immune-binding protein

E. Prepares adaptive immune memory

A. Prokaryotic microorganism

Section E — Short Answer

20 marks

5 questions · 4 marks each. Answer in one or two sentences.

41.Explain why the presence of a microorganism does not automatically mean that disease will occur.Advanced4 pts

42.Describe how innate and adaptive immunity can cooperate during an infection.Advanced4 pts

43.Explain how antibiotic use can select for resistant bacteria.Advanced4 pts

44.Why can respiratory infections spread efficiently even when an infected person does not have severe symptoms?Advanced4 pts

45.Explain why vaccination is considered prevention rather than a treatment that directly kills pathogens.Advanced4 pts

← Gateway