"Lock and key" model. To explain the observed specificity of enzymes, in 1894 Emil Fischer proposed that both the enzyme and the substrate possess specific complementary geometric shapes that fit exactly into one another. This is often referred to as "the lock and key" model.
9. Make sure that each experiment is repeated three times to make the results reliable. 10. When repeating the experiment with diluted concentrations make that you gently swirl the test tube with the solution inside to make sure that you thoroughly dilute the H 2 O 2.
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In competitive inhibition, the substrate and inhibitor cannot bind to the enzyme at the same time, as shown in the figure on the right. This usually results from the inhibitor having an affinity for the active site of an enzyme where the substrate also binds; the substrate and inhibitor compete for access to the enzyme's active site.
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After allowing the 2 ATP molecules consumed in reactions catalyzed by hexokinase and phosphofructokinase enzyme, the net ATP production is 8. Substrate Level Phosphorylation
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An introduction to how some proteins function as enzymes, and the general features of enzyme catalysis
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