Factors That Affect A Living Organism

1477 Words Apr 29th, 2015 6 Pages
Introduction: In biology, one of the factors that characterize a living organism is its ability to carry out necessary chemical reactions for its survival. Our bodies are in a state of homeostasis which is the physiological way we keep ourselves balanced, in such things as blood pressure or body temperature. Many of the chemical processes that are performed in the body use enzymes; they are referred to as the “biological catalysis of life” (Hillis,2012). Enzymes are protein catalysts that can initiate a reaction or speed it up. Enzymes speed up reaction rate by decreasing the activation energy required to start the reaction. Activation energy is the energy required to break certain bonds in the substrate so that other bonds can form. The formation of these new bonds results in the formation of the product. The chemicals that are transformed with the help of enzymes are called substrates. In the absence of enzymes, these chemicals are called reactants. Enzymes, like all proteins, are affected by the environment. Changes in external factors such as temperature, pH levels and concentration can affect the rate of the enzymes reaction, which we will explore in this lab. The spectrophotometer is going to help us analyze the speed of the reaction taking place in each test tube. The spectrophotometer is an instrument which measures the amount of light of a specified wavelength which passes through a medium. “According to Beer 's law, the amount of light absorbed by a medium is…
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