Enzymes Practice

How do enzymes speed up chemical reaction?

• Increasing activation energy
• Decreasing activation energy
• Increasing deactivation energy
• Decreasing deactivation energy

With what 3 letters do enzymes typically end?

• -ose
• -ase
• -ese
• -tic

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 .
  

Any substance that is acted upon by an enzyme is called a(n)?

• Product

• Substrate

• Vitamin

• Polypeptide

Based on the graph, what is the optimal temperature for this enzyme? 

• 15^oC
• 40^oC
• 30^oC
• 35^oC

Enzymes are...

• nucleic acids
• proteins
• lipids
• carbohydrates

An enzyme speeds up a chemical reaction in the cell but can only be used once.  True or False? 

• true
• false

What is the function of an enzyme?

• enzymes break themselves into small pieces
• enzymes slow down chemical reactions
• enzymes speed up chemical reactions
• enzymes combine products to form reactants 

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

Which of these is most likely an enzyme?  

• Sucrose
• Galactose
• Fructose
• Amylase