Unit 3 Review & Water Potential

Which of the following would NOT denature an enzyme?

• HIGH temperature

• LOW pH

• HIGH pH

• LOW temperature

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

• No change in the reaction rate

• Increase in reaction rate

• Decrease in reaction rate

• Decrease then increase in reaction rate

Which of the following is NOT a way that enzymes speed up chemical reactions?

• Strain bonds in the structure

• Orient reacting molecules

• Provide favorable environment

• Increase required energy of activation

An enzyme can make an endergonic reaction into an exergonic reaction.

• True

• False

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

How does a noncompetitive inhibitor decrease reaction rates?

• Binds to the active site

• Binds to the allosteric site

• Increases the free energy

• Increases the substrate concentration

The decreased production of enzyme Trp-T would have which of the following responses?

• Decrease in Tryptophan concentration

• Increase in I3PA concentration

• Increase in IAA concentration

• Decrease in I3PA & IAA concentration

Describe the effect on the free energy of doubling the amount of enzyme.

• double the free energy

• half the free energy

• triple the free energy

• no effect on free energy

Which structure is unaffected by denaturation?

• Primary

• Secondary

• Tertiary

• Quaternary

Which of the following will increase the rate of the reaction?

• increase product

• increase substrate

• increase inhibitor

• increase enzyme