The effect of PH on Enzymes

An acid is a substance that releases

• H+ in water
• H- in water
• OH- in water
• O+ in water

On the pH scale higher numbers indicate

• acids
• bases

Neutralization happens when acids and base combine

• True
• False

If you have a substance with a pH of 8 it is

• an acid
• a base
• neutral

If you have a substance with a pH of 7.1 it is

• an acid
• a base
• neutral

A pH of 14 is a .....

• strong acid
• weak acid
• strong base
• weak base

Which food is the most acidic?

• milk
• lemon juice
• milk of magnesia
• water

Which food is the most acidic?

• milk
• lemon juice
• milk of magnesia
• water

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 .
  

The pH at which an enzyme is most efficient is called the _________ pH of an enzyme.

• neutral
• optimum
• minimum
• experimental