Igcse Model Questions Vol1 2021 Biology Question 4

A student investigates how the concentration of glucose affects the rate of respiration in germinating beans. The set‑up is a sealed 250 mL flask containing 5 germinating beans and a known amount of glucose solution. The flask is connected to a gas syringe that measures the volume of CO₂ produced. For each glucose concentration, the volume of CO₂ collected after exactly 30 minutes is recorded. | Glucose concentration (% w/v) | CO₂ collected (mL) after 30 min | |-------------------------------|-----------------------------------| | 0 | 5 | | 2 | 12 | | 4 | 20 | | 6 | 27 | | 8 | 33 | Using this data, answer the following questions.