Enzymes

Enzymes are considered to be 

• Lipids
• Carbohydrate
• Protein
• Nucleic Acid

What is the purpose  of an enzyme?

• give permission for the reaction
• raise activation energy
• speed up reactions
• control how many reactions occur

Where do substrates bind on an enzyme?

• voltage-gated channels
• surface receptor
• calcium channels
• active site

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 is the name for the mechanism of enzyme activity?

• Lock and key
• jigsaw puzzle
• hammer and nail
• two hands pattern

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

• Coenzyme
• Substrate
• Vitamin
• Polypeptide

What happens when enzymes are heated to a high temperature?

• The enzymes die.

• The shapes of the enzyme are altered, it denatures

• The enzymes' amino acid sequence changes.

• The enzymes remain the same

What is another name for enzymes?

• chemical catalysts
• microorganisms
• biological catalysts
• inorganic catalysts

Which of these enzymes is in your saliva and helps to breakdown carbohydrates into sugars?  

• Sucrase
• Galactose
• Fructose
• Amylase

Which of these enzymes breaks down the sugar in milk?  

• lactose
• lactase
• Fructose
• Amylase