1. Chapter 7: Test yourself questions 1IGCSE Biology © Cambridge University Press
Test yourself questions
1 Which food would provide calcium for tooth formation?
2 Which nutrient helps collagen to form?
3 Why is digestion necessary?
4 Which is a correct sequence of organs through which food
passes in the alimentary canal?
5 In which organs is protease secreted?
Chapter 7
Animal nutrition
A cabbage
B milk
C oranges
D liver
A carbohydrates
B iron
C vitamin C
D vitamin D
A to destroy harmful microorganisms in the food
B to make food pass easily through the alimentary canal
C to make nutrient molecules small enough to be absorbed
D to release the energy from nutrients
A oesophagus, stomach, small intestine
B stomach, small intestine, pancreas
C small intestine, pancreas, liver
D pancreas, liver, large intestine
A gall bladder and liver
B mouth and large intestine
C stomach and pancreas
D oesophagus and small intestine

2. 2 Chapter 7: Test yourself questions IGCSE Biology © Cambridge University Press
6 How do bile salts help with digestion?
7 What is the name for the muscular contractions that move food through
the alimentary canal?
8 Which component of pancreatic juice provides a suitable pH for
the enzymes to work in the duodenum?
9 Which is the correct sequence in which food is dealt with in the body?
10 Why is fluoride sometimes added to water supplies?
11 Which part of the alimentary canal absorbs most water from food?S
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A They break large droplets of fat into smaller ones.
B They contain lipase, which digests fats.
C They kill bacteria in the food.
D They neutralise the acidic contents of the stomach.
A assimilation
B digestion
C peristalsis
D sphincter muscle
A mucus
B lipase
C protease
D sodium hydrogencarbonate
A ingestion, digestion, absorption, assimilation
B digestion, assimilation, absorption, ingestion
C assimilation, ingestion, absorption, digestion
D absorption, digestion, ingestion, assimilation
A to improve the flavour of the water
B to prevent scurvy
C to reduce tooth decay
D to sterilise the water
A mouth
B stomach
C small intestine
D colon

3. Chapter 7: Test yourself questions 3IGCSE Biology © Cambridge University Press
12 What happens to the pH of milk, as bacteria convert it to yoghurt?
13 What happens to excess amino acids in the liver?
14 What is the name of the blood vessel that carries absorbed nutrients from
the small intestine to the liver?
15 Which is a role of the microvilli on the surface of villi?
S
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A It falls, because the bacteria produce lactic acid.
B It falls, because the bacteria use up the milk proteins.
C It rises, because the bacteria neutralise the acids in the milk.
D It rises, because the bacteria produce sodium hydrogencarbonate.
A They are converted to vitamins for storage.
B They are deaminated to produce urea.
C They are excreted in bile.
D They are used to make proteins.
A hepatic artery
B hepatic portal vein
C pulmonary artery
D renal vein
A to destroy bacteria
B to increase the surface area for absorption
C to move food through the alimentary canal
D to secrete hydrochloric acid