Enzyme Function and Characteristics

After the enzyme and substrate bind together and perform the reaction, what does the substrate become?

• 
  a substrate

• an enzyme

• 
  a product

• 
  an active site

Enzymes provide a site where reactants called substrates can be brought together in an enzyme-catalyzed reaction. The site is called the

• active site

• lock and key

• reaction site

• 
  enzyme substrate complex

What happens when enzymes are heated to a high temperature?

• 
  The enzymes die.

• 
  The enzymes' amino acid sequence changes.

• They can undergo denaturation

• The enzymes remain the same

Enzymes lower the activation energy of a reaction. What does this mean for the reaction?

• The reaction will not occur

• The reaction will occur more slowly

• The reaction will occur more quickly

• The reaction will require more energy

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DOK Level 1: Recall

Enzymes are composed of which of the following building blocks? 

• Amino Acids

• Nucleotides

• Monosaccharides

• Acyl groups

Significantly changing the pH the enzyme is exposed to will cause the enzyme to

• 
  increase enzymatic action

• Denature

• 
  evaporate

• 
  fit better with the substrate 

What factors affect an enzyme's reaction rate?

• 
  temperature & pH

• carbohydrate building blocks & pH

• 
  amount of light & temperature

• amount of amino acids & temperature

The "lock and key hypothesis" attempts to explain the mechanism of

• vacuole formation

• enzyme specificity

• pinocytosis

• sharing of electrons

Here are of some stages of an enzyme-controlled reaction. An enzyme-substrate complex is represented by diagram:

• A

• B

• C

• D

An enzyme that rapidly breaks down a protein molecule in the stomach may break down that same protein much more slowly in the small intestine or mouth because

• the enzyme is digested in those locations
  

• no protein molecules are located in the small intestine or the mouth
  

• the enzyme changes to fit different molecules in different locations
  

• the stomach may have a more suitable environment for the enzyme to work