Effect of Temperature and pH on Enzymatic Activity

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 affects Enzyme activity?

• cold temperature & pH levels
• hot or cold temperature & environment
• high temperature &  pH levels
• pH levels & environment

At high temperatures enzyme activity declines because of:

• Denaturation
• Decreased Kinetic Motion
• Increased H-Bonding
• Dissociation of Ionic Compounds

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

• 15^oC
• 40^oC
• 30^oC
• 35^oC

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

• true
• false

Tags

NGSS.HS-PS1-2

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 NOT true?

• Enzymes can denature (change shape) when the temperature gets too high.
• Enzymes can only be used once in a chemical reaction. 
• Extreme pH can denature enzymes.
• Enzymes speed up chemical reactions. 

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

• neutral
• optimum
• minimum
• experimental 

If enzyme C is functioning at 25°C and a pH of 7, under which conditions would the rate of enzyme action probably increase?Use the chart below and your knowledge of enzymes to answer the question.

• The temperature is decreased to 22 C and the pH is kept the same
• The temperature is kept the same and the pH is decreased to 6
• The temperature is increased to 44 C and the pH is kept the same
• The temperature is increased to 30 C and the pH is increased to 8

Which statement best describes the enzyme represented in the graphs below? 

• This enzyme works best at a temperature of 35 C and a pH of 8
• This enzyme works best at a temperature of 50 C and a pH of 12
• Temperature and pH have no influence on the activity of this enzyme
• This enzyme works best at a temperature above 50 C and a pH above 12