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- 1. Multiple Choice
Enzymes are an example of
Lipids
Carbohydrate
Protein
Nucleic Acid
- 2. Multiple ChoiceWhat is the purpose of an enzyme?give permission for the reactionraise activation energyspeed up reactionscontrol how many reactions occur
- 3. Multiple ChoiceEnzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?reducing the number of productsreducing the activation energyincreasing the temperature of the cellincreasing the concentration of reactants
- 4. Multiple ChoiceWhat 3 letters do enzymes typically end in?-ose-ase-ese-tic
- 5. Multiple ChoiceAfter the enzyme and substrate bind together and perform the reaction, what does the substrate become?a substratean enzymea productan active site
- 6. Multiple ChoiceIn a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?ReactantsProductsAtomsCatalysts
- 7. Multiple Choice
An enzyme speeds up a reaction bylowering the activation energy.raising the activation energy.releasing energy.absorbing energy. - 8. Multiple ChoiceBased on the graph, what is the optimal temperature for this enzyme?15oC40oC30oC35oC
- 9. Multiple ChoiceWhat is a substance called if it speeds up a chemical reaction?reusablecatalystspecificfragile
- 10. 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.
- 11. 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 .
- 12. Multiple ChoiceWhat happens when enzymes are heated to a high temperature?The enzymes die.The shapes of the enzyme are altered denatureThe enzymes' amino acid sequence changes.The enzymes remain the same
- 13. Multiple ChoiceEnzymes catalyze reactions by ___________ Activation Energy.IncreasingDecreasing
- 14. Multiple Choice
How does temperature effect the reaction rate?
Increased temperature increases the reaction rate
Decreased temperature increases the reaction rate
Increased temperature decreases the reaction rate
Decreased temperature decreases the reaction rate
- 15. Multiple Choice
A student is investigating how reaction rate changes over a range of enzyme concentration. The student uses excess reactants. Which of the following graphs best represents the relationship between enzyme concentration and reaction rate?
a.
b.
c.
d.
- Answer choicesTagsAnswer choicesTags