Igcse Model Questions Vol1 2020 Biology Question 4

A group of students investigates the effect of temperature on the rate of aerobic respiration in baker's yeast. In each trial 5 g of dry yeast is mixed with 50 ml of 5 % (w/v) glucose solution in a sealed 250 ml conical flask fitted with a delivery tube leading to an inverted graduated cylinder (capacity 100 ml) filled with water. The volume of CO₂ collected in the graduated cylinder is recorded for 10 minutes at three different water‑bath temperatures. Data obtained: | Temperature (°C) | Volume of CO₂ collected (ml) | |------------------|------------------------------| | 25 | 12.5 | | 35 | 22.8 | | 45 | 38.1 | Answer the following: