Enzyme Activity & Reaction States

• The energy of the transition state of an enzymatic reaction is higher than the energies of both the substrate and the product.
• The statement that is false regarding transition states in enzymatic reactions is that they have a lower energy than both the substrate and product.
• An exothermic reaction is signified by the energy of the product being lesser than that of the enzyme-substrate complex.

Enzyme Activity Graph

• The optimum pH of the enzyme is 6.6, based on the provided graph.
• Enzymes lower the activation energy of chemical reactions.
• The region on an enzyme where the substrate binds is called the active site.
• The process of an enzyme losing its shape and function due to extreme conditions is called denaturation.
• The substance on which an enzyme acts is called the substrate.
• Competitive inhibitors decrease the activation energy by binding to the active site, which blocks the substrate.
• The body being kept relatively warm to prevent too much enzyme action describes the connection between the constant body temperature of 98.6 degrees and enzyme involvement in chemical reactions.
• The shape of an enzyme determines its function in that enzymes are specific to a substrate.
• The primary purpose of a microscope is to magnify images.
• A scanning electron microscope (SEM) uses electrons to visualize specimens.
• All proteins are not enzymes; some proteins have other functions.
• Enzymes are polymers of amino acids.
• At high temperatures, enzyme activity declines due to denaturation.
• Grading scale:
  • 100-90 (A)
  • 89-80 (B)
  • 79-70 (C)
  • 69-60 (D)
  • 0-59 (F)