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- 1. Multiple Choice
How do enzymes speed up chemical reaction?
Increasing activation energy
Decreasing activation energy
Increasing deactivation energy
Decreasing deactivation energy
- 2. Multiple ChoiceWhat is a substance called if it speeds up a chemical reaction?reusablecatalystspecificfragile
- 3. Multiple ChoiceEach enzyme only has 1 substrate that will fit its active site. What is this called?reusablilitydenaturationspecificityfragility
- 4. Multiple ChoiceWith what 3 letters do enzymes typically end?-ose-ase-ese-tic
- 5. Multiple Choice
The 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. - 6. 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 .
- 7. Multiple ChoiceAny substance that is acted upon by an enzyme is called a(n)?CoenzymeSubstrateVitaminPolypeptide
- 8. Multiple ChoiceBased on the graph, what is the optimal temperature for this enzyme?15oC40oC30oC35oC
- 9. Multiple ChoiceIn the diagram, what is letter A?productsubstrateenzyme-substrate complexactive site
- 10. Multiple ChoiceEnzymes are...nucleic acidsproteinslipidscarbohydrates
- 11. Multiple ChoiceAn enzyme speeds up a chemical reaction in the cell but can only be used once. True or False?truefalse
- 12. Multiple Choice
What is the function of an enzyme?
Enzymes break themselves into small pieces.
Enzymes slow down chemical reactions.
Enzymes speed up chemical reactions.
Enzymes combine products to form reactants.
- 13. Multiple Choice
What happens when enzymes are heated to a high temperature?
The enzymes die.
The shapes of the enzymes are altered.
The enzymes' amino acid sequence changes.
The enzymes remain the same.
- 14. Multiple ChoiceWhich 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.
- 15. Multiple Choice
Which of these is most likely an enzyme?
Sucrose
Galactose
Fructose
Helicase
- 16. Multiple ChoiceWhich is NOT true?Enzymes speed up chemical reactions.Enzymes react best at a specific temperature.Enzymes only control ONE type of reaction.Enzymes are made of fatty acids.
- 17. Multiple ChoiceWhat is another name for enzymes?chemical catalystsmicroorganismsbiological catalystsinorganic catalysts
- 18. Multiple ChoiceBabies do not have well developed digestive systems for breaking down proteins; therefore baby food is prepared after treatment with which enzyme?proteaselipasecarbohydrasesynthase
- 19. Multiple ChoiceThe pH at which an enzyme is most efficient is called the _________ pH of an enzyme.neutraloptimumminimumexperimental
- 20. Multiple ChoiceThe current model of enzyme action is referred to as the...Induced Fit ModelLock & Key ModelSinger-Nicolson ModelDavson-Danielli Model
- 21. Multiple ChoiceEnzymes speed up reaction rates by changing...Activation EnergypHHydrogen BondsKinetic Energy
- 22. Multiple ChoiceLetter D...active siteenzymesubstrateproducts
- 23. Multiple ChoiceLetter B...active siteenzymesubstrateproducts
- 24. Multiple ChoiceLetter C...active siteenzymessubstrateproducts
- 25. Multiple ChoiceLetter E...active siteenzymesubstrateproducts
- 26. Multiple ChoiceWhat factors affect an enzyme's reaction rate?temperaturepHsubstrate concentrationall of these
- 27. Multiple Choice
Which of these is most likely an enzyme?
Sucrose
Saccharide
Fructose
Amylase
- 28. Multiple ChoiceThe graph shows the effect of temperature on enzyme action. What characteristic do enzymes E1, E2, and E3 share?Their activity increases between 20°C and 30°C.Their activity is greatest between 5°C and 10°C.Their activity is at a low level between 15°C and 25°C.Their activity is at a high level between 30°C and 40°C.
- 29. Multiple Choice
What is the optimal pH of enzyme A?
8
2
5.7-10
10
- 30. Multiple ChoiceWhat is the pH range of enzyme A?20-3.73.70
- 31. Multiple ChoiceWhat is indicated by letter A?enzymeproductsubstrateactive site
- Answer choicesTagsAnswer choicesTags