CHAPTER 5.2 ENZYMES

The graph below shows how the activity of an enzyme changes over a range of pH values. 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 continually increases as pH increases from 5.0 to 9.0
• The enzyme’s activity is greater around pH of 8.0 than around pH of 5.0.

The diagram below illustrates a biochemical process that occurs in organisms. What is another name for the substance labeled "catalyst"?

• Enzyme
• inorganic compound
• Hormone
• Antibody

Which of the following best explains why enzymes are necessary for many cellular reactions?

• Enzymes supply the oxygen necessary for the reactions
•  Enzymes change reactants from solid to liquids during the reactions.
• The reactions take up too much space in the cell if the enzymes are missing.
• The reactions are too slow to meet the needs of the cell if enzymes are missing. 

What will most likely happen if an appropriate enzyme is added to a chemical reaction? 

• The reaction rate will increase.
• The equilibrium of the reaction will be maintained. 
• The reaction rate will decrease.
• The reaction will stop. 

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NGSS.HS-PS1-5

The enzyme lactase will break down the sugar lactose into which of the following components? 

•  monosaccharides
• nucleic acids
• amino acids
• phospholipids

Enzymes are an example of

• Lipids

• Carbohydrate

• Protein

• Nucleic Acid

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NGSS.MS-LS1-7

What is the purpose  of an enzyme?

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

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NGSS.MS-LS1-7

Enzymes are capable of increasing the rate of a chemical reaction within a living cell.  Enzymes accomplish this through which of the following means?

• reducing the number of products   
• reducing the activation energy
• increasing the temperature of the cell
• increasing the concentration of reactants 

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NGSS.HS-PS1-4

NGSS.HS-PS1-5

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

• reusable
• catalyst
• specific
• fragile

What 3 letters do enzymes typically end in?

• -ose
• -ase
• -ese
• -tic