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Question 1 of 20
1. Question1 point(s)
Which processes depend on the action of enzymes?
Question 2 of 20
2. Question1 point(s)
Which is the equation for anaerobic respiration in yeast?CorrectIncorrect
Question 3 of 20
3. Question1 point(s)
Yeast is able to respire both aerobically and anaerobically.
Which statement describes the waste products of yeast respiration?CorrectIncorrect
Question 4 of 20
4. Question1 point(s)
Aerobic respiration involves the break down of glucose.
C6H12O6 + …x…O2 → …y…H2O + …z…CO2 + energy
Which values for x, y and z balance the equation?
x y z A 6 4 6 B 6 6 6 C 6 12 6 D 12 12 12CorrectIncorrect
Question 5 of 20
5. Question1 point(s)
A student investigated aerobic respiration.
Soda lime absorbs carbon dioxide.
If the woodlice are respiring aerobically, what will happen to the drop of liquid?CorrectIncorrect
Question 6 of 20
6. Question1 point(s)
Potted plants are left for a week in a tank of water as shown.
Why do the plants die?CorrectIncorrect
Question 7 of 20
7. Question1 point(s)
Which statement about both aerobic and anaerobic respiration is correct?CorrectIncorrect
Question 8 of 20
8. Question1 point(s)
The components of a reflex arc are shown in the flow diagram.
receptor → sensory neurone → synapse → relay neurone → synapse → motor neurone → effector
Which component is responsible for ensuring that the nerve impulses travel in one direction only?CorrectIncorrect
Question 9 of 20
9. Question1 point(s)
Oxygen is required for aerobic respiration.
How many molecules of oxygen are required for the aerobic respiration of three molecules of glucose?CorrectIncorrect
Question 10 of 20
10. Question1 point(s)
Which process uses energy released by respiration?CorrectIncorrect
Question 11 of 20
11. Question1 point(s)
The volume of oxygen taken up by germinating seeds was measured.
The graph shows the results.
What is the rate of oxygen uptake?CorrectIncorrect
Question 12 of 20
12. Question1 point(s)
Yeast, warm water and substance Z were put into a test-tube. The apparatus was then set up as shown. After a while, the lime water began to go cloudy.
What is substance Z?CorrectIncorrect
Question 13 of 20
13. Question1 point(s)
The diagram shows a germinated bean seed with a horizontal radicle. This is placed on a slowly rotating disc and is left for three days.
Which diagram shows the appearance of the radicle after three days?CorrectIncorrect
Question 14 of 20
14. Question1 point(s)
What is produced by anaerobic respiration in a muscle?
lactic acid carbon dioxide A ✓ ✓ B ✓ x C x ✓ D x x
✓ = produced
x = not producedCorrectIncorrect
Question 15 of 20
15. Question1 point(s)
The table shows the percentage composition of three gases in atmospheric air.
oxygen carbon dioxide nitrogen 21 0.04 78
What is the composition of the air breathed out by a person?
oxygen / % carbon dioxide / % nitrogen / % A 5 73 20 B 16 4 78 C 21 0.04 78 D 78 2 20CorrectIncorrect
Question 16 of 20
16. Question1 point(s)
Four test-tubes were set up as shown in the diagram and left in full sunlight.
After several hours, which test-tube would contain the most dissolved carbon dioxide?
Question 17 of 20
17. Question1 point(s)
The table shows the approximate composition of air breathed out by a mammal.
gas air breathed out / % nitrogen 80 oxygen 16 carbon dioxide 4
Where did the nitrogen in the air breathed out come from?CorrectIncorrect
Question 18 of 20
18. Question1 point(s)
What are the products of anaerobic respiration in muscles?CorrectIncorrect
Question 19 of 20
19. Question1 point(s)
Why is yeast used in bread-making?CorrectIncorrect
Question 20 of 20
20. Question1 point(s)
Apparatus was set up as shown.
Sodium hydroxide removes carbon dioxide from the air. Limewater goes cloudy if carbon dioxide is bubbled through it.
What happens to the limewater in flasks X and Y when the pump is switched on?
flask X flask Y A goes cloudy goes cloudy B goes cloudy stays clear C stays clear goes cloudy D stays clear stays clearCorrectIncorrect