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- 1. Multiple Choice
Enzymes are types of
lipids
carbohydrates
proteins
nucleic acids
- 2. Multiple Choice
What is the purpose of an enzyme?
to give permission for a chemical reaction
to raise activation energy
to speed up a chemical reactions
to control how many chemical reactions occur
- 3. Multiple ChoiceAny substance that is acted upon by an enzyme is called a(n)?CoenzymeSubstrateVitaminPolypeptide
- 4. Multiple ChoiceWhere do substrates bind on an enzyme?voltage-gated channelssurface receptorcalcium channelsactive site
- 5. Multiple Choice
Enzymes are capable of increasing the rate of a chemical reaction within a living cell. How do they do this?
by reducing the number of products
by reducing the activation energy
by increasing the temperature of the cell
by increasing the substrate concentration
- 6. Multiple Choice
What 3 letters do enzyme names typically end in?
-ose
-ase
-ese
-tic
- 7. Multiple Choice
What is structure A?
Substrate
Active site
Enzyme
Products
- 8. Multiple Choice
What is structure D?
Substrate
Active site
Enzyme
Products
- 9. Multiple Choice
Each enzyme only has 1 substrate that will fit its active site. What characteristic of the enzyme is this?
The enzyme is reusable.
The enzyme is a catalyst.
The enzyme is specific.
The enzyme is fragile.
- 10. Multiple Choice
What is structure C?
Substrate
Active site
Enzyme
Products
- 11. Multiple Choice
What is structure E, F, G?
Substrate
Active site
Enzyme
Products
- 12. Multiple ChoiceWhat is a substance called if it speeds up a chemical reaction?reusablecatalystspecificfragile
- 13. Multiple ChoiceAfter the enzyme and substrate bind together and perform the reaction, what does the substrate become?a substratean enzymea productan active site
- 14. Multiple Choice
Once a product leaves an enzyme, the enzyme is unchanged and ready for the next substrate. What is this called?
The enzyme is reusable.
The enzyme is a catalyst.
The enzyme is specific.
The enzyme is fragile.
- 15. Multiple Choice
Changes in pH and temperature can damage an enzyme's active site. What is this called?
The enzyme is reusable.
The enzyme is a catalyst.
The enzyme is specific.
The enzyme is fragile.
- 16. Multiple ChoiceThe graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?Enzymes increase the energy of the reactants.Enzymes decrease the energy level of the products.Enzyme decrease the activation energy of the reaction.Enzymes reverse the direction of the reaction.
- 17. Multiple ChoiceWhich 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 5.8The enzyme’s activity increases as pH increases 5.0 to 9.0The enzyme’s activity is greater around pH of 8.0 .
- 18. Multiple Choice
What is the name for the way enzymes and substrates fit together so specifically?
Lock and key
jigsaw puzzle
hammer and nail
two hands pattern
- 19. Multiple Choice
What characteristic of enzymes does the "lock and key hypothesis" explain?
Enzymes are reusable.
Enzymes are fragile.
Enzymes are catalysts.
Enzymes are specific.
- 20. Multiple Choice
Which of the following molecules is classified as an enzyme?
Galactose
Lipid
Protease
Manganese dioxide
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