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Microbiology Essentials for Students

Microbiology

A collection of factual questions covering basic microorganisms, their roles, and how they interact with the world.

science biology microbes

12 Questions Medium Ages 5+ Oct 30, 2026

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About this Study Set

This study set covers Microbiology through 12 practice questions. A collection of factual questions covering basic microorganisms, their roles, and how they interact with the world. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 12 questions from the Microbiology Essentials for Students study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Which of the following is a type of microorganism that can only reproduce by infecting a host cell?

A Bacteria
B Virus
C Fungus
D Algae

2 What is the primary function of decomposers like bacteria and fungi in an ecosystem?

A To produce oxygen
B To hunt small insects
C To break down dead organic matter
D To provide sunlight to plants

3 Which instrument is commonly used in classrooms to view microorganisms that are too small to see with the naked eye?

A Telescope
B Periscope
C Microscope
D Magnifying glass

4 Which of these is a beneficial use of yeast, a type of microscopic fungus, in food production?

A Making bread rise
B Killing harmful bacteria
C Adding color to fruit
D Digesting plastic

5 Which group of microorganisms is responsible for turning milk into yogurt through fermentation?

A Viruses
B Bacteria
C Parasites
D Protozoa

6 What is the term for microorganisms that cause infectious diseases in humans, animals, or plants?

A Antibiotics
B Pathogens
C Nutrients
D Probiotics

7 Which of these is a single-celled microorganism that belongs to the kingdom Protista?

A Amoeba
B Mushroom
C Earthworm
D Spider

8 Where are bacteria most commonly found?

A Only in laboratories
B Only in human bodies
C Almost everywhere on Earth
D Only in outer space

9 Which substance is produced by some types of fungi and is used in medicine to treat bacterial infections?

A Insulin
B Penicillin
C Vitamin C
D Caffeine

10 What do bacteria need to grow and multiply in a laboratory setting?

A A petri dish with nutrients
B Bright direct sunlight
C Extreme freezing temperatures
D A vacuum-sealed container

11 How do most bacteria reproduce?

A By laying eggs
B By binary fission
C By photosynthesis
D By seed dispersal

12 Which microorganism is responsible for the process of nitrogen fixation in the soil, which helps plants grow?

A Virus
B Bacteria
C Yeast
D Mold

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