Effect of Temperature and pH on Enzymatic Activity

The enzymes become denatured if the temperature is _______ compared to its optimum temperature.

• too high or too low

• too low

• too high

What do we know about the enzyme's structure if the enzyme is in its optimum pH

• the enzyme structure is not denatured, meaning that the active site is still in tact

• ​the enzyme structure is not denatured, meaning that the active site is changed

• the enzyme structure is denatured

What temperature do you think our enzymes will work the best at?

• room temperature, 25 degrees

• 0 degree

• 50 degrees

• 37 degrees

Tags

NGSS.HS-PS1-5

Which of the factors does NOT affect enzymatic activity?

• Temperature
• pH
• Concentration
• Color

Enzymes need certain environmental conditions in order to function properly.  What happens when enzymes are heated to a high temperature?

• they die
• they denature
• they change their amino acid sequence
• they work better

What happens when an enzyme changes shape?

• The reaction speeds up
• The reaction slows down
• The enzyme dies
• The enzyme has to change back its shape to work

What is it called when an enzyme's shape is changed?

• Destroy
• Denature
• Delete
• Demolish

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. 

Tags

NGSS.HS-PS1-5

Enzyme A digests proteins in the stomach (environment with a pH of 2).  Enzyme B digests proteins in the small intestine (environment with a pH of 8). Which of the following is NOT true:

• Enzyme A would be denatured in the small intestine.
• Enzyme A works best in acidic conditions.
• Enzyme A can also work in the small intestine.
• Enzyme A helps in the hydrolysis of proteins.

Sucrase has an optimum temperature of 37 C and an optimum pH of 6.2. What would happen if the pH changed to 3?

• Sucrase would continue to work the same
• The reaction sucrase catalyzes would speed up
• The reaction sucrase catalyzes would slow down