Form/Class
Name
Structured Questions: Bacteria in the Human Digestive System
1
Some types of bacteria are pathogens. Suggest what this means.
2
Other types of bacteria live in our bodies and are beneficial. You may have heard of them referred to
as 'friendly bacteria'. Name a function that bacteria have in our digestion.
3
A company who makes yogurts with ‘friendly bacteria’ in wants to test how they affect people’s
digestion. They gather a group of 10 willing volunteers and each volunteer must eat a yogurt a day
and record what digestive symptoms they have and how they feel.
a Suggest three ways that this is not a valid method
b A customer of the company has heard about the benefits of gut bacteria but cannot afford to buy
their yogurts every day. What advice could you give to them to naturally increase their gut bacteria
levels?
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1
Teachers’ Club Science – Structured questions
Teachers’ Club Science
Biology
Teachers’ Club Science – Structured questions
Teachers’ Club Science
Chemistry
Form/Class
Name
Answers
1. They do us harm/cause disease/make us ill.
2. Breaking down foods, producing enzymes, producing Vitamins (B and K), fermenting, releasing
energy.
3a.There are a variety of reasons such as:
Sample size too small, not analysing quantitative data, people have different bacteria in their
digestive system, there is no control group, there are too many external uncontrolled factors like
what they’re eating, whether they’re having other probiotic foods.
3b. Eat a varied diet containing plenty of whole foods, fruit and vegetables.
2
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