Enzymes and Chemical Reactions

Learn how enzymes speed up reactions! Practice identifying factors affecting enzyme function and interpreting activity graphs.

Fill in the blanks below Enzymes are proteins and their function is to speed up chemical reactions. They are also sometimes called a catalyst. They speed up chemical reactions by lowering the activation energy. Enzymes are made up of what monomer (hint - think about what type of molecule they are) monosaccharides fatty acids amino acids nucleotides Enzymes are made by which organelle (hint - think about what type of molecule they are) nucleus ribosome cell membrane mitochondria Label the diagram using the word bank below enzyme, substrate, products, active site enzyme products substrate active site Fill in the blanks in the passage below There are three factors that impact the function of enzymes. They are temperature, pH, and substrate concentration. When the temperature is too cold molecules move slow which slows down the reaction. When the temperature is too hot the enzymes loses its shape and becomes denatured. Each enzymes has an optimal pH at which they work best. If the environment is too acid or too basic it will lower the enzyme activity. If enzymes do not have enough substrate to work on the reaction rate will be low. When substrate is added the reaction rate will increase until it reaches the point of saturation when the reaction rate levels off. Use the graph below to answer the multiple choice question What is the optimal temperature of the enzyme in the graph above? 0 22 42 59 Use the graph below to answer the questions Which enzyme works best in an acidic environment? pepsin trypsin lactase Which enzyme would you most likely find in your stomach? pepsin trypsin amylase Which enzyme has an optimal pH of about 8 pepsin trypsin lactase