Lesson T1.3.5
T1.3.5 Bacteria in the digestive system Quiz: KS3 Biology, Unit 1
20 questions
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Lesson T1.3.5, Bacteria in the digestive system: 20 multiple choice questions for the KS3 Biology (National Curriculum), Unit 1: Structure and function of living organisms, written with Revision Ninja.
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The 20 questions
-
Which beneficial microorganisms live in the human large intestine?
- Gut bacteria
- Parasitic worms
- Fungal spores
- Pathogenic viruses
-
What do beneficial gut bacteria help humans to digest?
- Mineral ions
- Vitamins
- Certain fibre
- Pure water
-
Which vitamin is synthesized by bacteria in the large intestine?
- Vitamin D
- Vitamin A
- Vitamin K
- Vitamin C
-
What can antibiotics accidentally kill in the digestive system?
- Useful gut bacteria
- Stomach acid
- Digestive enzymes
- Intestinal walls
-
Which type of bacterium in the gut can cause food poisoning?
- Useful bacteria
- Harmful bacteria
- Neutral bacteria
- Symbiotic bacteria
-
What dietary component helps keep beneficial gut bacteria healthy?
- Dietary fibre
- Refined sugar
- Saturated fat
- Pure glucose
-
Which part of the digestive system is warm and contains undigested food for bacteria?
- Mouth
- Stomach
- Oesophagus
- Large intestine
-
Which organ is the main home for bacteria in the human gut?
- The oesophagus
- The large intestine
- The stomach
- The mouth
-
What kills most harmful bacteria swallowed with food?
- Pancreatic juice
- Saliva enzymes
- Stomach acid
- Bile juice
-
Which statement describes the nature of gut bacteria?
- Inert and dead
- Always pathogenic
- Useful or harmful
- Always beneficial
-
What do live bacteria in yoghurt help to support?
- Bile production
- Enzyme secretion
- Stomach acidity
- Helpful gut bacteria
-
Why must gut bacteria be kept in a healthy balance?
- Increase acidity
- Stop digestion
- Produce mucus
- Prevent illness
-
What type of organism is a bacterium?
- Multicellular fungus
- Complex virus
- Single-celled microorganism
- Parasitic worm
-
What effect do antibiotics often have on helpful gut bacteria?
- Make them resistant
- Change their colour
- Increase their growth
- Reduce their number
-
What do beneficial gut bacteria produce that benefits the body?
- Stomach acid
- Certain vitamins
- Red blood cells
- Bile salts
-
What do gut bacteria use for growth and reproduction?
- Red blood cells
- Undigested food
- Gastric juice
- Pure water
-
Name two processes that gut bacteria assist the body with.
- Filtration and excretion
- Vision and hearing
- Respiration and circulation
- Digestion and vitamins
-
A pupil eats yoghurt with live cultures. Which organ is most directly affected by these bacteria?
- The heart
- The brain
- The large intestine
- The lungs
-
What would reduce if large intestine bacteria were killed?
- Water intake
- Fibre digestion
- Protein absorption
- Starch breakdown
-
What are gut bacteria?
- Digestive hormones
- Digestive cells
- Digestive microorganisms
- Digestive enzymes
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