CIE iGCSE Co-Ordinated Science B7.1 Diet Exam Style Questions Paper 3
Question
(a) Fig. 1.1 is a diagram of the alimentary canal and associated organs.
(i) State the letter in Fig. 1.1 that identifies where:
most absorption occurs …………………………………..
egestion occurs …………………………………..
ingestion occurs …………………………………..
saliva is produced. …………………………………..
(ii) State the names of the parts labelled D and H in Fig. 1.1.
D …………………………………………………………………………
H …………………………………………………………………………
(iii) Complete the sentence to define the term digestion.
Digestion is the ………………………………………… of large, insoluble food molecules into small, water-soluble molecules using mechanical and ………………………………………… processes.
(b) The boxes on the left show some nutrients.
The boxes on the right show some principal sources of nutrients.
Draw one straight line from each nutrient to its principal source.
nutrient principal source
(c) Describe the dietary importance of iron.
▶️Answer/Explanation
Ans : 1(a)(i) F ;
E ;
J ;
A ;
1(a)(ii) D – pancreas ;
H – liver ;
1(a)(iii) breakdown ;
chemical ;
1(b) 
1(c) making haemoglobin / prevent anaemia / AVP ;
Question
(a) A person keeps a food diary for one day. They photograph everything that they eat and drink in the day.
Fig. 1.1 shows an extract from the diary.
(i) Identify one food item from Fig. 1.1 that is a principal source of:
carbohydrate ………………………………………………………………………………………………………
protein ……………………………………………………………………………………………………………….
vitamins ……………………………………………………………………………………………………………..
(ii) State why it is important to drink water as part of a balanced diet.
………………………………………………………………………………………………………………………….
………………………………………………………………………………………………………………………….
(b) Rice is classified as a starch that provides a lot of fibre.
(i) State the colour iodine solution turns when added to starch.
………………………………………………………………………………………………………………………….
(ii) Circle the component from which starch is made.
amino acids fatty acids glucose
glycerol glycogen
(iii) Describe the importance of fibre in the diet.
………………………………………………………………………………………………………………………….
………………………………………………………………………………………………………………………….
(c) Olive oil is a liquid fat used for cooking food.
Tick (√) the boxes to show the three chemical elements present in all cooking oils.
▶️Answer/Explanation
Ans: 1(a)(i) rice ;
chicken ;
(green) beans / cucumber / onions / salad ;
1(a)(ii) as a solvent / any valid point ;
1(b)(i) blue-black ;
1(b)(ii) glucose circled ;
1(b)(iii) prevents constipation / keeps food moving through the gut ;
1(c) carbon, hydrogen and oxygen ticked ;
Question
(a) Table 7.1 shows the number of different types of teeth in sheep and humans.
(i) Calculate the total number of teeth for sheep.
…………………………………………………………………………………………………………………….
(ii) Place ticks (✓) in two boxes to show which statements are correct for the data in Table 7.1.
(b) The boxes on the left contain the different types of teeth.
The boxes on the right contain the different functions of the types of teeth.
Draw one line from each type of tooth to its correct function.
Two types of teeth have the same function.
(c) State the names of the two outermost layers of a tooth.
1 ………………………………………………………………………………………………………………………………
2 ………………………………………………………………………………………………………………………………
(d) Teeth are used for one type of digestion.
State the name of this type of digestion.
…………………………………………………………………………………………………………………………..
▶️Answer/Explanation
Ans: 7(a)(i) 20 ;
7(a)(ii) sheep have the same number of pre-molar and molar teeth ticked ;
humans have twice the number of molar teeth than sheep ticked ;
7(b)
1 or 2 teeth linked correctly ;
3 teeth linked correctly ;
4 teeth linked correctly ;
7(c) dentine ;
enamel ;
7(d) mechanical ;