Online Quiz: British Curriculum Primary 6 Biology Quiz: Microorganisms
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Level 6🧬 BiologyTerm 12025/2026Teacher: Almanahj
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Cambridge Primary 6 Biology: Microorganisms
A Cambridge Primary 6 Biology quiz on microorganisms, useful microbes, harmful microbes and safe investigation methods.
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Question 1
1 point
Use the model. What is a microorganism?
Explanation
Microorganisms are microscopic living organisms.
Question 2
1 point
Which group includes microorganisms?
Explanation
Bacteria are microorganisms.
Question 3
1 point
Which is also a microorganism?
Explanation
Yeast is a microscopic fungus.
Question 4
1 point
Why do scientists use microscopes to study microbes?
Explanation
Magnification is needed to observe many microorganisms.
Question 5
1 point
Which microbe is useful in bread making?
Explanation
Yeast respires and produces carbon dioxide that makes dough rise.
Question 6
1 point
What gas makes bread dough rise when yeast is active?
Explanation
Yeast fermentation releases carbon dioxide.
Question 7
1 point
Which condition often helps many microbes grow quickly?
Explanation
Many microbes reproduce fastest with suitable temperature, water and food.
Question 8
1 point
Why is hand washing important?
Explanation
Soap and water help remove microbes.
Question 9
1 point
Which disease can be caused by microorganisms?
Explanation
Some microbes can contaminate food and cause illness.
Question 10
1 point
Why should raw meat be kept separate from ready-to-eat food?
Explanation
Separation helps prevent cross-contamination.
Question 11
1 point
Which is a useful role of microorganisms in nature?
Explanation
Decomposers recycle nutrients.
Question 12
1 point
What does pasteurisation help do?
Explanation
Heating can reduce the number of harmful microorganisms.
Question 13
1 point
Why should a microbe investigation use sealed dishes?
Explanation
Safe practice prevents microbes escaping or contaminating samples.
Question 14
1 point
What is a colony on an agar plate?
Explanation
Individual microbes can multiply into visible colonies.
Question 15
1 point
Why compare a washed hand print and unwashed hand print?
Explanation
This compares the effect of washing.
Question 16
1 point
What is the independent variable in that test?
Explanation
The independent variable is deliberately changed.
Question 17
1 point
What is the dependent variable?
Explanation
This is the measured result.
Question 18
1 point
Which statement is balanced and scientific?
Explanation
Microbes have many roles, both helpful and harmful.
Question 19
1 point
Why should antibiotics not be used for viral infections?
Explanation
Antibiotics target bacterial processes.
Question 20
1 point
What is the main idea of this lesson?
Explanation
Stage 6 learners should understand roles, safety and evidence.