Enzymes are affected by changes in pH. The most favorable pH value - the point where the enzyme is most active - is known as the optimum pH. This is graphically illustrated in Figure 14. Extremely high or low pH values generally result in complete loss of activity for most enzymes. pH is also a factor in the stability of enzymes.
Osmosis is the chemical process of diffusion, involving the transfer of solvent with a lower concentration of a certain solute through a semipermeable membrane, and into the area containing a higher concentration of that solute. It sounds like a confusing concept to teach younger children just getting into the sciences, but it’s actually quite simple, and can […]
Enzymes are biological catalysts that can speed up, and control, chemical reactions that would otherwise virtually never occur at normal body temperature, 37°C. Thousands of chemical reactions are occurring in the human body every moment of life, and each of these reactions is controlled by a particular enzyme. Enzymes are extremely efficient.
Fresh liver or potato contains enzymes peroxidase and catalase that help in evolving oxygen from hydrogen peroxide. The enzymes are functional at room temperature (test tube three) but heating destroys their activity (test tube four). Therefore, heat kills enzyme activity but has little effect on the activity of a catalyst. Precautions:
The part of the potato that comes in contact with hydrogen peroxide will produce minuscule bubbles and white foam. ... free radicals that would tear apart enzymes. ... for my chemistry lab, i ...
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A potato, salt, water (if you have distilled water, that kind is best), a couple of drinking glasses. Procedure: Fill two glasses with water; In one of the glasses add 2-3 tablespoons of salt, and stir it in; Slice up a potato into French fry-like pieces; Make your observations on these pieces: pay attention to color, how flexible it is, smell ...