Neco 2020 Biology Question 4
Practice practical question 4 from the 2020 Neco Biology examination. This question covers Respiration, Cellular metabolism, Experimental techniques .
Students investigated the effect of temperature on the rate of respiration in germinating beans using a closed respirometer. The respirometer consisted of a sealed bottle fitted with a cotton plug and a graduated glass tube (inner diameter 1.0 cm) inverted in a water trough. Ten germinating beans were placed in the bottle, the bottle was filled with water, sealed and the fall in water level was recorded after 30 minutes. At 25°C the water fell 2.0 cm; at 35°C the water fell 3.2 cm. Atmospheric pressure was 760 mmHg. The water vapour pressure at 25°C is 23.8 mmHg and at 35°C is 42.2 mmHg. Assume the gas collected behaves ideally and that the volume of water displaced equals the volume of gas consumed.
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This is Neco 2020 Biology Question 4. It is one of the practical questions from the 2020 Neco Biology examination.
The question covers Respiration, Cellular metabolism, Experimental techniques .
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