K.C.S.E Biology Q & A - MODEL 2015PP1QN09
The diagram below shows an experimental set up to investigate a certain physiological process in plants.
​(a) State the aim of the experiment.
(b) State the role of the following in the experiment: (i) potassium hydroxide; (ii) aluminum foil. (c) Account for the expected colour change in tube F.
answers
​(a) To show that carbon (TV) oxide is produced during respiration in plants;
(b) (i) Absorb carbon (IV) oxide from the (incoming) air; (ii) Exclude light / to prevent photosynthesis; (c) No colour change in tube F / no observable colour change. Carbon (IV) oxide removed/absorbed from air by potassium hydroxide. |
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