Biology Practice: Respiration in Plants (Mock Test 4 - Expert: Experimental Setups & Data Analysis)
1. In an experiment to prove that $CO_2$ is produced during respiration, why are the seeds placed in a conical flask with a small tube containing "KOH" (Potassium Hydroxide)?
2. When performing an experiment on respiration with green leaves, why must the setup be kept in a "Dark Room"?
3. A student uses two thermos flasks: Flask A with live germinating seeds and Flask B with boiled seeds (disinfected with antiseptic). What data is expected?
4. Why is it necessary to use "Antiseptic" (like formalin) on the control group of boiled seeds in respiration experiments?
5. In an experiment to show anaerobic respiration, a test tube is filled with mercury and inverted. If seeds are placed under the mercury, a gas accumulates at the top. This gas is:
6. If a piece of "KOH" is introduced into the gas collected above the mercury in an anaerobic respiration experiment, the mercury level:
7. Lime water turns "Milky" when air from a flask of germinating seeds is passed through it. This confirms the presence of:
8. Experimental Logic: Why is it difficult to demonstrate respiration in a single whole plant during the day?
9. In an experiment using a "Ganong's Respirometer", the movement of the liquid level helps in calculating the:
10. If germinating seeds are kept in a flask and a burning candle is introduced, the candle goes out. This proves:
