Food Tests
Q1.
The diagram below shows the human digestive system.
 
(a)  Label organs A, B and C.
(3)
(b)  Complete the sentences.
Choose the answers from the box.
 
catalyse	denatured	digest	energise	
excreted	ingested	insoluble	soluble	
Digestion is the process of breaking down large food molecules into smaller
molecules that are ____________________________ .
Enzymes help to break down food because they ____________________________
chemical reactions.
If the temperature of an enzyme gets too high, the enzyme is _________________ .
(3)
(c)  Protease is an enzyme.
Protease breaks down protein.
What is protein broken down into?
Tick one box.
 
Amino acids		
Fatty acids		
Glucose		
Glycerol		
(1)
(d)  Why is protein needed by the body?
___________________________________________________________________
___________________________________________________________________
(1)
(e)  Which organ in the human digestive system produces protease?
Tick one box.
 
Gall bladder		
Large intestine		
Liver		
Stomach		
(1)
(f)   Describe how you would test a sample of food to show it contains protein.
Give the reason for any safety precautions you would take.
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
(4)
(g)  Complete the sentence.
Choose the answer from the box.
 
fat	fibre	minerals	vitamins	
Obesity can be caused by a diet high in _______________________ .
(1)
(h)  Complete the sentence.
Choose the answer from the box.
 
skin cancer	type 1 diabetes	type 2 diabetes	
Obesity is a risk factor for _______________________ .
(1)
(Total 15 marks)