Question 2
FA student investigates the energy released by germinating peas.
The Figure shows the apparatus.
Figure
The student records the temperature in each flask at the start and after 3 days.
The Table shows the results.
Table
| Flask | Temperature at the start in ∘C^\circ\text{C}∘C | Temperature after 3 days in ∘C^\circ\text{C}∘C |
|---|---|---|
| A (germinating peas) | 20 | 26 |
| B (boiled peas) | 20 | 20 |
a.[1]
Calculate the increase in temperature in flask A.
b.[1]
Name the process in the germinating peas that causes the temperature to increase.
c.[1]
Complete the sentence. Use a word from the list.
endothermic exothermic photosynthesis diffusion
Respiration is an ............................ reaction because it releases energy to the surroundings.
d.[1]
Suggest why the temperature in flask B does not change.
1.3 Respiration Questions
113 exam-style questions on OCR GCSE Biology 1.3 Respiration, covering 1.3.1 Cellular respiration supplies ATP, 1.3.2 Aerobic and anaerobic respiration, 1.3.3 Sugars and carbohydrates, 1.3.4 Amino acids and proteins, and 1.3.5 Fatty acids and lipids. Each one has a worked solution and a mark scheme showing where the marks go.