Enzyme Review

Enzymes are considered to be 

• Lipids

• Carbohydrate

• Protein

• Nucleic Acid

Where do substrates bind on an enzyme?

• voltage-gated channels

• surface receptor

• calcium channels

• active site

What is the purpose  of an enzyme?

• give permission for the reaction

• raise activation energy

• speed up reactions

• control how many reactions occur

How do enzymes speed up chemical reaction?

• Increasing activation energy

• Decreasing activation energy

• Increasing deactivation energy

• Decreasing deactivation energy

Each enzyme only has 1 substrate that will fit its active site.  What is this called?

• reusable

• catalyst

• specific

• fragile

Once a new product leaves an enzyme, the enzyme is unchanged and ready for the next substrate.  What is this called?

• reusable

• catalyst

• specific

• fragile

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)?

• Coenzyme

• Substrate

• Vitamin

• Polypeptide

Based on the graph, what temperature does this enzyme work best? 

• 15 C

• 40 C

• 30 C

Which of the following binds to the active site of an enzyme? 

• substrate

• product

• codon

• none of the above