Enzymes Lesson

Enzymes are considered to be 

• Lipids
• Carbohydrate
• Protein
• Nucleic Acid

What is the purpose  of an enzyme?

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

Where do substrates bind on an enzyme?

• voltage-gated channels
• surface receptor
• calcium channels
• active site

How do enzymes increase the speed of chemical reactions?

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

What is a substance called if it speeds up a chemical reaction?

• reusable
• catalyst
• specific
• fragile

What is the name for the mechanism of enzyme activity?

• Lock and key
• jigsaw puzzle
• hammer and nail
• two hands pattern

Any substance that is acted upon by an enzyme is called a(n)?

• Coenzyme
• Substrate
• Vitamin
• Polypeptide

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

can a change in pH alter the active site of an enzyme

• yes
• no

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