Enzymes

Front

What kind of reaction is this?

Back

Exergonic and catabolic

Front

Why has this enzyme activity decreased so much?

Back

The enzyme has become denatured

Front

What happens when an enzyme denatures?

Back

The secondary/tertiary structure of the protein has changed

Front

What happens to the pepsin enzyme in alkaline conditions?

Back

The enzyme will denature and no longer work.

Front

Which type of inhibition can be overcome by adding more substrate?

Back

Competitive inhibition

Front

Which of the following can be used to determine the rate of enzyme-catalyzed reactions?

• Rate of disappearance of the enzyme
• Rate of disappearance of the substrate
• Rate of disappearance of the product
• Change in volume of the solution

Back

Rate of disappearance of the substrate

Front

Which 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.

Back

Enzymes can only be used once in a chemical reaction.

Front

Which line represents an enzyme-catalyzed reaction? Options: Line 1, Line 2

Back

Line 2

Front

How does a noncompetitive inhibitor decrease reaction rates?

Back

Binds to the allosteric site

Front

Based on the graph, what is the optimal temperature for this enzyme? Options: 15^oC, 40^oC, 30^oC, 35^oC

Back

30^oC