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Checkpoint Biology 0893

Grade 6 - Unit 1: Cells and organisms

0/11 Dr Dabour Hub Science Diagram and Course Material

Grade 6 - Unit 4: Living organisms and classification

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Grade 6 - Unit 7: Microorganisms and food webs

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Grade 7 - Unit 1: Breathing and respiration

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Grade 7 - Unit 4: Ecosystems

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Grade 7 - Unit 7: Nutrition, health and movement

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Grade 8 - Unit 1: Cells and organisms

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Grade 8 - Unit 4: Living organisms and classification

0/12 Dr Dabour Hub Science Diagram and Course Material

Grade 8 - Unit 7: Microorganisms and food webs

0/10 Dr Dabour Hub Science Diagram and Course Material
Quiz

7.1 Nutrients

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Nutrients Checkpoint Biology quiz: free practice for Cambridge Checkpoint Biology 0893. Work through this Nutrients Checkpoint Biology quiz and get instant feedback on every answer. If you get stuck, review the 6.1 Nutrients lesson. More practice: Cambridge Checkpoint Biology 0893 — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: B+
  • Time limit:
Start Quiz
1.
Use Yusuf's results and energy (J) = mass of water (g) × 4.2 × temperature rise (°C). How much energy did 1.0 g of cashew transfer to the water?
4515 J, using the final temperature of 43 °C
1995 J, using the starting temperature of 19 °C
600 J, from 25 × 24 without the 4.2
2520 J, about 2.5 kJ
2.
Which nutrient helps build and repair body tissues?
Fat
Protein
Carbohydrate
Fibre
3.
Fibre helps the body by:
Carrying oxygen
Building muscles
Making bones hard
Keeping food moving through the gut
4.
Hannah heated four drinks with Benedict's solution in a water bath. The diagram shows the colours after 5 minutes. Which order runs from least to most reducing sugar?
Dr Dabour Hub Science Diagram and Course Material
W, Z, X, Y (brick-red means no sugar)
Y, Z, X, W
X, Y, W, Z
Y, X, Z, W
5.
Which nutrient is needed for growth and repair?
Protein
Water only
Fat only
Starch
6.
Which statement correctly describes carbohydrate?
the tiny structure inside a cell that releases energy from glucose
the type of food that is especially good for giving us energy
what glucose is - the energy is locked inside it until it is released
the substances that react together, here glucose and oxygen
7.
Chen is a vegan athlete who eats no meat, fish, eggs or milk. Which food would best supply the protein he needs for muscle repair?
Olive oil salad dressing
Lentils and beans
Plain rice cakes
Fresh orange segments
8.
Ade tests a school meal for protein with biuret solution. He also adds biuret solution to a tube of water only. Why?
Water contains protein, so it should turn purple
It shows the negative colour to compare with
It makes the biuret solution work faster in the meal
It lets him measure the energy in the meal as well
9.
Omar tested the same carton of orange juice each day by adding it drop by drop to 1 cm³ of blue DCPIP until the blue colour disappeared. What does his graph show?
Dr Dabour Hub Science Diagram and Course Material
The vitamin C content rose as more drops were needed
The juice gained sugar, so it took longer to react
DCPIP becomes weaker each day, so the juice is unchanged
The vitamin C content of the juice fell as it was stored
10.
Each option pairs a nutrient with a food that is a good source of it. Which pairing is correct?
Fibre – butter and cooking oil
Vitamin C – white rice and pasta
Calcium – milk, yoghurt and cheese
Protein – honey and table sugar
11.
Each option pairs a nutrient with a problem caused by lacking it. Which pairing is correct?
Vitamin C – rickets, with bent bones
Iron – anaemia, which causes tiredness
Fibre – kwashiorkor, with poor growth
Calcium – scurvy, with bleeding gums
12.
Sami burned 1.0 g of each food under 20 g of water. His results are in the bar chart. Which food most likely contains the largest proportion of fat?
Dr Dabour Hub Science Diagram and Course Material
Dried apple, as fruit sugar is the richest energy store
White bread, as starch releases the most energy per gram
Peanut, because it gave the biggest temperature rise
Potato crisp, as fried foods always hold the most fat
13.
Dev added two drops of iodine solution to six foods on a spotting tile. The dark wells turned blue-black; the others stayed orange-brown. Which conclusion is supported by his results?
Dr Dabour Hub Science Diagram and Course Material
Rice and flour contain starch; egg white does not
Apple juice and sugar solution contain starch
Potato contains glucose, as its well turned dark
Egg white contains starch but no other nutrients
14.
Each option pairs a food test reagent with its positive colour change. Which pairing is correct?
Iodine solution – blue to brick-red
Benedict's – orange-brown to blue-black
DCPIP – colourless to dark blue
Biuret solution – blue to purple
15.
Why should students wear goggles and use a water bath, not a direct flame, when heating Benedict's solution?
Goggles make the colour change easier to see clearly
Hot liquid can spit out; a water bath heats gently
A flame would turn the solution blue-black by itself
A water bath stops the food from containing sugar
16.
Leon says: "My sweets are full of sugar, so they give me everything I need." Which is the best response?
He is right, because sugar is used for growth and repair
He is right, as long as he also drinks plenty of water
Sugar gives no energy at all, so sweets are useless
Sugar gives energy, but he would lack other nutrients
17.
Use the bar chart of Sami's results (20 g of water heated by 1.0 g of food) and energy = mass of water × 4.2 × temperature rise. How much energy did the cashew release?
Dr Dabour Hub Science Diagram and Course Material
2268 J, about 2.3 kJ
540 J, about 0.5 kJ
113 J, about 0.1 kJ
2520 J, about 2.5 kJ
18.
The unlabelled foods were egg white, cheese, flour and honey. Which food number is most likely to be egg white?
Food 4, positive for protein and fat
Food 2, positive for protein only
Food 1, positive for starch only
Food 3, positive for sugar only
19.
Polar explorers are advised to eat extra fat. Which is the best reason?
Fat is needed to make haemoglobin for the blood
Fat is used mainly to build new muscle cells
Fat is a rich energy store and gives insulation
Fat adds bulk that helps food move through the gut
20.
The diagram shows Farah's set-up for comparing the energy in different foods. Which labelled part is used to measure the dependent variable?
Dr Dabour Hub Science Diagram and Course Material
Part B, which holds the fixed volume of water
Part A, which reads the water temperature
Part C, the food sample whose type is changed
Part D, the stand that keeps the tube still
21.
Lack of vitamin D can cause:
Scurvy
Rickets
Obesity
Anaemia
22.
Mr Okafor often suffers from constipation. Using the table, which cereal would be best for him?
Bran flakes, the highest in fibre
Rice pops, the lowest in fat
Oat porridge, the highest in protein
Frosted corn, the highest in carbohydrate
23.
Ahmed repeated his almond-burning test four times. Which answer correctly identifies the anomalous result and gives the best mean?
Trial 2; mean of all four trials is 21.3 °C
Trial 3; mean of all four trials is 21.3 °C
Trial 3; mean of the rest is 24.3 °C
There is no anomaly; mean of all four is 21.3 °C
24.
Calcium is needed for:
Strong bones and teeth
Digestion of fats
Vision
Blood clotting only
25.
Aisha wants to compare how much starch is in three types of bread using iodine solution. Which variables should she keep the same?
The type of bread and the colour it turns
The brand of bread and the final colour only
The time of day and the name of each bread
The size of each sample and the number of iodine drops
26.
Which of these is NOT a job of water in the body?
Supplying the body with energy in kilojoules
Transporting dissolved substances in the blood
Being the liquid where cell reactions take place
Cooling the body when sweat evaporates
27.
Which term is described as: the deficiency disease caused by a lack of vitamin C?
dietary fibre
deficiency disease
scurvy
vitamin
28.
Which term is described as: a substance in food that the body needs for energy, growth, repair or health?
nutrient
vitamin
protein
scurvy
29.
In the food-burning experiment, energy (J) = mass of water (g) × _____ × temperature rise (°C).
4.2 J per g per °C
the mass of the food
the starting temperature
the volume of the tube
30.
The body's main source of energy is _____.
fibre
water
protein
carbohydrate
31.
Rickets, in which leg bones become soft and bend, is linked to a lack of _____ in the diet.
vitamin C
iron (a mineral)
vitamin D
dietary fibre
32.
A cereal bar contains 10 g of fat, 20 g of carbohydrate and 5 g of protein. Using the table, the total energy in the bar is _____.
about 425 kJ
about 795 kJ
about 710 kJ
about 1295 kJ
33.
When a food is shaken with ethanol and the liquid is then poured into water, a _____ shows that fat is present.
blue-black colour
brick-red precipitate
purple colour change
cloudy white emulsion
34.
Vitamins and minerals are needed in large amounts because they supply most of the body's energy. True or false?
True – they are the body's main energy source
False – they are needed in small amounts
True, but only minerals such as iron give energy
False – they are needed in large amounts for fibre
35.
Zara put iodine solution on a slice of apple and it turned blue-black. She says this shows the apple contains glucose. True or false?
True – blue-black is the positive result for glucose
False – blue-black with iodine shows that starch is present
True, because apples are known to taste sweet
False – it shows that protein is present
36.
Protein is needed only for storing energy. - True or false?
True
False
37.
Children whose diet contains too little protein may develop kwashiorkor. True or false?
False – it is caused by a lack of vitamin C
False – it is caused by eating too much fat
True – kwashiorkor is a protein deficiency disease
True, but only in adults who do no exercise
38.
An illness caused by a missing nutrient is called an infectious disease. - True or false?
True
False
39.
Iron is needed to make haemoglobin, so a person lacking iron may feel tired because their blood carries less oxygen. True or false?
False – a lack of iron causes rickets instead
False – iron is only needed to make teeth hard
True – this deficiency disease is called anaemia
True, but iron is found only in red meat
40.
Calcium is a mineral needed for strong bones and teeth. - True or false?
True
False
41.
Gram for gram, fats release about twice as much energy as carbohydrates. True or false?
True – that is why fat makes a good energy store for the body
False – carbohydrates give twice the energy of fats
False – fats give no energy; they only insulate
True, but only for fats from animal sources
42.
In the iodine test on a food, a blue-black colour means that starch is absent. True or false?
True – blue-black is the negative result
True, but only when the food is heated first
False – blue-black means starch is present
False – blue-black means protein is present
43.
A crushed food gave a purple colour with biuret solution and a cloudy white emulsion with ethanol and water. This food contains both protein and fat. True or false?
False – purple with biuret shows starch, not protein
False – a cloudy emulsion shows sugar, not fat
True, but only the fat test can be trusted here
True – both the biuret and emulsion tests were positive
44.
Dietary fibre is not digested but keeps food moving through the gut. - True or false?
True
False
45.
Leila did the ethanol emulsion test on two crushed foods. The diagram shows her results. She concludes: "The food in tube Q contains no nutrients at all." True or false?
Dr Dabour Hub Science Diagram and Course Material
False – the clear result only shows that Q contains no fat
True – a clear liquid means every nutrient is absent
True, but only if Q was also heated in a water bath
False – tube Q contains fat, and tube P does not
46.
Kofi heated a food with Benedict's solution and it stayed blue. He says the food contains no carbohydrate at all. True or false?
False – it might still contain starch
True – every carbohydrate turns Benedict's red
True, as long as the tube was heated for a minute
False – blue shows that plenty of sugar is present
47.
An illness caused by a missing nutrient is called a deficiency disease. - True or false?
True
False
48.
Benedict's solution will change colour with glucose even if the test tube is left at room temperature. True or false?
False – it must be heated in a water bath
True – the colour change happens straight away
True, but only if iodine solution is added first
False – it only reacts with starch, never glucose
49.
Sweating helps control body temperature, which is one reason the body needs water. True or false?
False – water only moves food through the gut
True – evaporating sweat cools the body
False – body temperature is controlled by fibre
True, but water gives the energy that makes sweat
50.
Water is not needed by the body because it contains no nutrients. - True or false?
True
False
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Part of Grade 7 - Unit 7: Nutrition, health and movement — see every lesson and quiz in this unit.
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