Ijmb Model Questions Vol1 2024 Biology Question 4

A group of students set up a closed‑system respirometer to study the effect of temperature on the rate of respiration in germinating beans. The apparatus consists of a 200 mL airtight flask containing 5.0 g of freshly soaked beans immersed in 50 mL of water. The flask is connected to a manometer that records the internal pressure. The system is first equilibrated at 25 °C, then the pressure is recorded after 30 min; the reading falls from 760 mmHg to 750 mmHg. The experiment is repeated at 35 °C, and after 30 min the pressure drops from 760 mmHg to 740 mmHg. Assume the temperature of the gas inside the flask remains constant at the bath temperature, the volume of the flask does not change, and the gas behaves ideally. Using the data provided, answer the following questions.