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- 1. Multiple Choice
Most enzymes are composed of .....
Lipids
Carbohydrates
Proteins
Nucleic Acids
- 2. Multiple Choice
Which 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 . - 3. Multiple ChoiceBased on the graph, what is the optimal temperature for this enzyme?15oC40oC30oC35oC
- 4. Multiple ChoiceLetter D...active siteenzymesubstrateproducts
- 5. Multiple Choice
In an experiment to investigate the effect of temperature on the activity of a digestive enzyme X, the time taken for the digestion of a fixed amount of substrate by this enzyme was recorded. Which of the following graphs shows the most likely results of the experiment?
A
B
C
D
- 6. Multiple Choice
The graphs show the reaction rate for an enzyme across a range of temperatures and pH.
Based on these data, this enzyme functions best as what temperature and pH?
Temperature of 27oC and a pH of 4
Temperature of 37oC and a pH of 6
Temperature of 40oC and a pH of 8
Temperature of 50oC and a pH of 10
- 7. Multiple Choice
A student measured the time required for a protein sample to be completely digested in the presence of an enzyme under different pH levels. At which pH is the enzyme most active?
7.1
6.9
6.8
7.2
- 8. Multiple Choice
Based on the graph above, at what temperature range is enzyme activity at its greatest?
15-25 ºC
25-35 ºC
35-45 ºC
45-55 ºC
- 9. Multiple Choice
A student measured the time required for a protein sample to be completely digested in the presence of an enzyme under different pH levels. At which pH is the enzyme least active?
7.1
6.9
6.8
7.2
- 10. Multiple Choice
Which is the MOST valid conclusion based on this graph?
Enzymes are not affected greatly by temperature.
Enzymes work most effectively at low temperatures.
Raising the temperature always makes an enzyme work better.
Enzyme function decreases after a certain favorable temperature.
- 11. Multiple Choice
Enzymes are substances that speed up the rate of chemical reactions. The rate of enzyme action is affected by several factors. A researcher studying these factors made this graph. Which would be an appropriate title for this graph?
Enzyme Action and Changes in pH
The Effect of Temperature on Enzyme Populations
How Enzyme Action Alters Temperature
The Effect of Temperature on Enzyme Action
- 12. Multiple Choice
In this image, what does line 1 represent
the product
the reactant
the activation energy needed without using an enzyme
the activation energy needed using an enzyme
- 13. Multiple Choice
In this image, what does line 2 represent
the product
the reactant
the activation energy needed without using an enzyme
the activation energy needed using an enzyme
- 14. Multiple Choice
On this graph the X axis represents ________ and the Y axis represents _________________.
Energy, progress of the reaction
Energy, amount of product
progress of the reaction, energy
progress of the reaction, amount of product
- Answer choicesTagsAnswer choicesTags