Curriculum
Course: Checkpoint Biology 0893
time left:
:
:
Login

Curriculum

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

0/12 Dr Dabour Hub Science Diagram and Course Material

Grade 6 - Unit 7: Microorganisms and food webs

0/11 Dr Dabour Hub Science Diagram and Course Material

Grade 7 - Unit 1: Breathing and respiration

0/12 Dr Dabour Hub Science Diagram and Course Material

Grade 7 - Unit 4: Ecosystems

0/10 Dr Dabour Hub Science Diagram and Course Material

Grade 7 - Unit 7: Nutrition, health and movement

0/10 Dr Dabour Hub Science Diagram and Course Material

Grade 8 - Unit 1: Cells and organisms

0/10 Dr Dabour Hub Science Diagram and Course Material

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

1.4 Respiration

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit

Respiration Checkpoint Biology quiz: free practice for Cambridge Checkpoint Biology 0893. Work through this Respiration Checkpoint Biology quiz and get instant feedback on every answer. If you get stuck, review the 4.4 Respiration 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.
Aerobic respiration releases energy from glucose using:
Light
Carbon dioxide
Oxygen
Nitrogen
2.
Rosa set up two vacuum flasks of peas as shown. After 3 days the thermometer in flask A read 27 °C and in flask B read 20 °C. What explains the difference?
Dr Dabour Hub Science Diagram and Course Material
The boiled peas in flask B soak up heat from the air around them
Living peas respire and some energy is lost as heat
The peas in flask A photosynthesise, and photosynthesis gives out heat
Only anaerobic respiration gives out heat, and it happens just in flask A
3.
Zainab set up this apparatus. After a while the yeast has used up all the oxygen in the flask, and the limewater has turned milky. Which other product is now forming in the flask?
Dr Dabour Hub Science Diagram and Course Material
Ethanol, from yeast respiring without oxygen
Lactic acid, the same product that forms in human muscles
Oxygen, which the yeast gives out as it feeds on the sugar
Glucose, which is built from the carbon dioxide and water
4.
Joel counted bubbles given off by yeast in sugar solution at different temperatures. Which conclusion is best supported by his graph?
Dr Dabour Hub Science Diagram and Course Material
The hotter it is, the faster the yeast will always respire
The yeast respires fastest at 60 °C, when it has the most energy
The rate peaks near 35 °C, then falls
Temperature has no real effect on how fast yeast respires
5.
Cells X and Y come from two different tissues in the same animal. Which cell is more likely to come from a muscle that contracts a lot, and why?
Dr Dabour Hub Science Diagram and Course Material
Y, because having fewer mitochondria leaves more room to store energy
X, because its mitochondria make glucose for the muscle to use
Y, because a muscle cell does not need to respire when it contracts
X – more mitochondria to release energy
6.
Tariq sprinted for 2 minutes and then rested. Why does the lactic acid level in his blood fall after about 3 minutes?
Dr Dabour Hub Science Diagram and Course Material
His muscles turn the lactic acid back into oxygen while he rests
Extra oxygen he breathes in breaks it down
The lactic acid is breathed out as a gas through the lungs
His muscles start to respire anaerobically again while resting
7.
The diagram shows substances moving to and from a muscle cell. Which substance does arrow 3 represent?
Dr Dabour Hub Science Diagram and Course Material
Carbon dioxide gas
Oxygen gas
Glucose sugar
Lactic acid
8.
Use the bar chart. About how many times more energy does aerobic respiration release from each gram of glucose than anaerobic respiration in muscle?
Dr Dabour Hub Science Diagram and Course Material
About 15 times as much
About 2 times as much
About 20 times as much
About the same amount
9.
Which conclusion is best supported by the results in the table?
Dry peas are dead, because they give off only a little carbon dioxide
Boiled peas respire fastest, because heating speeds up respiration
Peas only start to respire once they have grown their first leaves
Germinating peas respire fastest; boiled peas not at all
10.
What pattern does the table show, and what explains it?
More energy used means more oxygen used
Running uses less oxygen, because she breathes faster while running
Oxygen use stays the same, whatever activity she is doing
Sleeping uses no oxygen at all, because the body is fully resting
11.
Why is the difference between the glucose entering and leaving the muscle greater during cycling?
Cycling makes the blood produce extra glucose inside the muscle
Resting muscles use more glucose than muscles that are working
Working muscle cells take more glucose to respire
In the muscle the glucose is turned into oxygen for cycling
12.
Which of these is NOT a use of the energy released by respiration?
Making glucose from carbon dioxide
Contracting muscles so that the body can move
Keeping a mammal's body temperature steady
Growing new cells and repairing damaged ones
13.
During a 100 m sprint, some of the energy in the leg muscles is released without oxygen. Why?
Anaerobic respiration releases more energy than aerobic respiration
The muscles stop using any glucose during a sprint
The lungs stop taking in air during very hard exercise
Oxygen cannot reach the muscles fast enough
14.
The symbol equation for aerobic respiration is C6H12O6 + 6O2 → 6CO2 + 6H2O. How many carbon dioxide molecules are made when 2 glucose molecules are respired?
6 carbon dioxide molecules
12 carbon dioxide molecules
2 carbon dioxide molecules
18 carbon dioxide molecules
15.
Kiran writes: "Respiration makes energy." Which is the best correction?
Respiration releases energy stored in glucose
Respiration makes energy from oxygen alone, without food
Respiration uses energy up in order to make glucose
Respiration makes energy, but only inside the lungs
16.
Why do the cells in your big toe need a blood supply?
It carries energy made in the lungs to the toe cells
It carries new mitochondria to the toe cells each day
It brings glucose and oxygen and removes carbon dioxide
It brings carbon dioxide for the toe cells to respire
17.
Each option pairs a substance with its role in aerobic respiration. Which pairing is correct?
Glucose – product, made in the mitochondria
Oxygen – reactant, carried by red blood cells
Water – reactant, taken in from the lungs
Carbon dioxide – reactant, used by the muscles
18.
Each option pairs an organism or situation with the products of its respiration. Which pairing is correct?
Muscle during a sprint – ethanol and carbon dioxide
Resting muscle with oxygen – only lactic acid
Yeast without oxygen – only lactic acid
Yeast without oxygen – ethanol and carbon dioxide
19.
Each option pairs a use of energy from respiration with an example. Which pairing is correct?
Keeping warm – a lizard basking on a hot rock
Growth – a leaf trapping energy from sunlight
Movement – leg muscles contracting in a race
Movement – oxygen diffusing into the blood
20.
Think about how glucose and oxygen get to body cells. Match a body part to how it helps. Which pairing is correct?
Small intestine – glucose absorbed into the blood
Lungs – glucose absorbed into the blood
Heart – oxygen made for the body cells
Mitochondria – carbon dioxide taken in from air
21.
Jana repeated her limewater test four times. What is the best value for the mean time?
35 s, leaving out trial 3
44 s, using all four trials
71 s, the longest time recorded
36 s, the result from trial 2
22.
During the limewater experiment, why are pupils told to breathe gently and never suck hard on the mouthpiece?
So that no carbon dioxide can escape out of the tubes into the room
So that the limewater turns milky faster for every breath taken
So no limewater is drawn into the mouth
So that the oxygen inside the tubes is not all used up too quickly
23.
Rahul times how long his breath takes to turn limewater milky before and after skipping. Which variable must he keep the same?
The volume of limewater in the tube
Whether he skips or rests before breathing out
The time taken for the limewater to turn milky
The number of pupils watching the experiment
24.
Which method would give the most accurate resting breathing rate for Nia?
Count her breaths for 5 seconds only and then multiply by 12
Count for one minute without her knowing
Ask her to breathe as deeply as she can and count for one minute
Count her breaths straight after she has run up the stairs
25.
Which term is described as: the sugar that carbohydrates are broken down into, delivered to every cell by the blood?
glucose
mitochondrion
energy store
carbohydrate
26.
Energy is released from glucose inside tiny structures called _____.
chloroplasts
alveoli
mitochondria
capillaries
27.
In Maryam's results, dough C rose the most because at 35 °C the yeast respired fastest and made the most _____.
oxygen gas
lactic acid
carbon dioxide gas
glucose sugar
28.
Anaerobic respiration in human muscles turns glucose into _____.
ethanol and carbon dioxide
lactic acid
carbon dioxide and water
oxygen and water
29.
After hard exercise, the extra oxygen needed to break down lactic acid is called the _____.
oxygen debt
oxygen surplus
carbon dioxide debt
lactic acid store
30.
Respiration speeds up as temperature rises, up to an optimum, because the reactions are controlled by _____.
the lungs and trachea
red blood cells
the cell walls
enzymes in cells
31.
In Dev's investigation shown in the table, breathing rate is the _____.
independent variable
dependent variable
control variable
anomalous result
32.
In aerobic respiration the products are carbon dioxide and water. - True or false?
True
False
33.
The digestive system breaks carbohydrates down into glucose. - True or false?
True
False
34.
The digestive system breaks carbohydrates down into oxygen. - True or false?
True
False
35.
Mitochondria store energy inside glucose so the cell cannot use it. - True or false?
True
False
36.
Statement: Leo's revision table is fully correct and needs no changes. True or false?
True – every row correctly compares the two types of respiration
False – row 2 should say anaerobic respiration makes carbon dioxide
False – row 3 is the wrong way round
False – row 1 should say anaerobic respiration also needs oxygen
37.
Statement: these results show the bean plant respired in the dark, and faster at higher temperatures. True or false?
True – oxygen use rose as it got warmer
False – plants only photosynthesise and never respire at all
False – plants can only respire when they are in bright light
True, but only because the plant photosynthesised in the box
38.
Respiration takes place in every living cell, not just in the lungs. True or false?
False – respiration takes place only inside the lungs
False – only muscle cells are able to respire
True, but only in animal cells and never in plant cells
True – in the mitochondria of cells
39.
Plants photosynthesise during the day and respire only at night. True or false?
True – respiration can only happen in darkness
False – plants respire all the time
True – photosynthesis stops respiration in daylight
False – plants never respire, day or night
40.
Yeast can respire without oxygen, and this is called fermentation. True or false?
False – yeast can only ever respire using oxygen
False – fermentation is when yeast makes lactic acid
True – it makes ethanol and carbon dioxide
True, and fermentation gives out oxygen as a product
41.
Sam says a mouse and a lizard of the same mass, both at 10 °C, release energy by respiration at the same rate because both are animals. True or false?
False – the mouse needs energy to keep warm
True – all animals of the same mass respire at the same rate
True – mice and lizards both have mitochondria in their cells
False – the lizard respires faster in order to keep warm
42.
Glucose is carried to cells dissolved in the blood plasma, while oxygen is carried by red blood cells. True or false?
False – red blood cells carry both glucose and oxygen
True – both reactants reach cells this way
False – glucose is carried by red blood cells instead
True, but only while the person is exercising
43.
Body cells respire only while a person is moving; when the person is asleep, their cells stop respiring. True or false?
True – sleeping cells need no energy at all
True – respiration only happens during exercise
False – cells respire only during the night
False – cells respire all the time
44.
A sprinter's legs ache after a race partly because lactic acid has built up in the muscles. True or false?
False – lactic acid is only ever made by yeast
False – the aching is caused by too much oxygen
True – it causes muscle fatigue
True, and the lactic acid comes from aerobic respiration
45.
In a leaf cell, respiration takes place in the chloroplasts. True or false?
False – it happens in the mitochondria
True – chloroplasts release the energy stored in glucose
True – leaf cells do not contain any mitochondria
False – leaf cells do not respire at all
46.
Energy released by respiration is needed for the growth and repair of cells. True or false?
False – growth and repair use no energy at all
True – building new cells uses energy
False – the energy is used only for movement
True, but only in young children who are growing
47.
If the oxygen supply to a muscle cell is cut off, the cell can still release a little energy from glucose for a short time. True or false?
False – no energy can be released without oxygen
True – it releases even more energy without oxygen
False – the muscle cell starts photosynthesising
True – by anaerobic respiration
48.
In Faisal's limewater apparatus, the tube that room air bubbles through acts as a control for comparison with exhaled air. True or false?
False – a control tube must have no air at all passing through it
True – it shows what ordinary air does
False – exhaled air passes through both tubes in this apparatus
True, but only if this tube turns milky before the other tube
49.
To show exhaled air is warmer, Tom measures room air by an open window, then his breath in a warm kitchen. This is a fair test. True or false?
True – he used the same thermometer for both of the readings
True – exhaled air is always warmer, so the place makes no difference
False – a thermometer is not able to measure the temperature of air
False – the place changed as well as the air
50.
Asif counted his own breathing rate one morning and his friend's after football, then concluded that football raises breathing rate. His test was fair. True or false?
True – football always raises the breathing rate of anyone
False – person and time also changed
True – he used the same stopwatch for both of the counts
False – breathing rate cannot be timed with a stopwatch
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
Part of Grade 7 - Unit 1: Breathing and respiration — see every lesson and quiz in this unit.
Accepted payment methods