enzyme graphs - Assessment

1.

Multiple Choice

1 min

1 pt

Most enzymes are composed of .....

Lipids

Carbohydrates

Proteins

Nucleic Acids

2.

Multiple Choice

1 min

1 pt

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 5.8

The enzyme’s activity increases as pH increases 5.0 to 9.0

The enzyme’s activity is greater around pH of 8.0 .

3.

Multiple Choice

1 min

1 pt

Based on the graph, what is the optimal temperature for this enzyme?

15^oC

40^oC

30^oC

35^oC

4.

Multiple Choice

1 min

1 pt

Letter D...

active site

enzyme

substrate

products

5.

Multiple Choice

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

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