ENZYMOLOGY

Enzymes are categorized by the reaction it catalyzes

• True

• False

Enzyme that join two molecules via covalent bond is categorized as

• Ligase

• Hydrolase

• Lyase

• Transferase

In Lock and Key model, enzymes are portrayed as flexible and can be reshaped

• True

• False

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

• Enzymes increase the energy of the reactants.
• Enzymes decrease the energy level of the products.
• Enzyme decrease the activation energy of the reaction.
• Enzymes reverse the direction of the reaction.

In the diagram, what is letter A? 

• product
• substrate
• enzyme-substrate complex
• active site

Letter C...

• active site
• enzymes
• substrate
• products

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  
• The optimum pH of the enzyme is 5.8
  
• The enzyme’s activity increases as pH increases 5.0 to 9.0
  
• The enzyme’s activity is greater around pH of 8.0 .
  

What makes an enzyme substrate specific?

• Size
• Shape
• Name
• Location it is found in

What happens when enzymes are heated to a high temperature?

• The enzymes die.
• The shapes of the enzyme are altered denature
• The enzymes' amino acid sequence changes.
• The enzymes remain the same

Enzymes speed up reaction rates by changing...

• Activation Energy
• pH
• Hydrogen Bonds
• Kinetic Energy