The authors of this experiment, The Effects of some Inhibitors on the Rates of
Photosynthesis and Respiration by Chlorella, knew that the rates of photosynthesis and
respiration of many plants are affected by an adding chemicals. (Yaun and Daniels, 2000) The
authors in this experiment would like to know in which ways different inhibitors affect
photosynthesis and respiration distinctly.
Objectives
How certain inhibitors affect photosynthesis
How certain inhibitors affect respiration
Hypothesis
The hypothesis of this study is as follows; the addition of some substances have strong
reactions to certain characteristics of photosynthesis and respiration is specific and effective.
(Yaun and Daniels, 2000) The null hypothesis …show more content…
(Yaun and Daniels, 2000)
Sometime after the addition of the chlorella the gas and liquid hit equilibrium. Each experiment
was at room temperature and used the same lamp. Microliters of the algae cells were put into the
culture. The normal rates of respiration in the dark and photosynthesis in the light for the
experiment were recorded. A small amount of the inhibitor was put in through a tube, and rates
of respiration and photosynthesis were recorded again. Calculations were written down and
recorded in a chart.
The independent variable in this experiment would be the different inhibitors, which
include, potassium cyanide, sodium azide, hydroxylamine hydrogen chloride, and dinitrophenol.
The dependent variable would be the chlorella. The control group would be potassium cyanide, a
common inhibitor in which the others are being compared to. The treatment group would be not
adding any inhibitors to the solution.
Results
The resulting effects of the inhibitors on photosynthesis and respiration are as
such; for potassium cyanide on respiration and photosynthesis was Respiration and is
stimulated at small amounts of potassium cyanide, and is only partially changed