Enzymes

Front

How do enzymes increase the rate of a chemical reaction within a living cell? Options: reducing the number of products, reducing the activation energy, increasing the temperature of the cell, increasing the concentration of reactants

Back

reducing the activation energy

Front

Any substance that is acted upon by an enzyme is called a(n)?

Back

Substrate

Front

In the diagram, what is letter A? Options: product, substrate, enzyme-substrate complex, active site

Back

enzyme-substrate complex

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

Front

What happens to the reaction rate if an enzyme is denatured or nonfunctional?

Back

Decrease in reaction rate

Front

How does a noncompetitive inhibitor decrease reaction rates?

Back

Binds to the allosteric site

Front

Which of the following is a way to overcome competitive inhibition of an enzyme?

• Increase product concentration
• Increase substrate concentration
• Decrease enzyme concentration
• Decrease environmental temperature

Back

Increase substrate concentration

Front

Which of the following would NOT denature an enzyme?

HIGH temperature

,

LOW pH

,

HIGH pH

,

LOW temperature

Back

LOW temperature

Front

Why are some bacteria metabolically active in hot springs?

Back

Their enzymes have high optimal temperatures.

Front

When a molecule can occupy the same active site as the substrate, a situation called __________________ can result. Options: Competitive Inhibition, Allosteric Regulation, Non-Competitive Inhibition, Feedback Inhibition

Back

Competitive Inhibition