Question
Which process uses energy released in respiration?
A diffusion
B evaporation
C growth
D osmosis
Answer/Explanation
Ans
C
Question
Yeast is able to respire both aerobically and anaerobically.
Which statement describes the waste products of yeast respiration?
A Aerobic respiration produces alcohol as one of its waste products.
B Aerobic respiration produces three times as much carbon dioxide as anaerobic respiration from one molecule of glucose.
C Anaerobic respiration and aerobic respiration both produce the same amount of carbon dioxide from one molecule of glucose.
D Anaerobic respiration produces three times as much carbon dioxide as aerobic respiration from one molecule of glucose.
Answer/Explanation
Ans: B
Question
The flow diagram summarises three different ways that glucose can be broken down to release
energy.
Which routes involve the action of enzymes?
A 1 only B 1 and 2 only C 2 and 3 only D 1, 2 and 3
Answer/Explanation
Ans: D
Question
Potted plants are left for a week in a tank of water as shown.
Why do the plants die?
A The roots do not have enough oxygen.
B The roots do not have enough water.
C The roots have too much oxygen.
D The roots have too much carbon dioxide.
Answer/Explanation
Ans: A