OPTIONAL 3.1 & 3.2 Review

What is the function of an enzyme?

• To speed up a chemical reaction

• To provide additional energy

• To inhibit a cellular process

• To increase absorption of a molecule

Which of the following would NOT denature an enzyme?

• Temperature is higher than optimal condition

• pH is lower than optimal condition

• pH is higher than optimal condition

• Temperature is lower than optimal condition

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?

• Provide a microenvironment specific to the reaction requirements.

• Optimally orient the reacting molecules to produce a reaction.

• Decrease the activation energy required by the reaction.

Tags

NGSS.HS-LS1-7

NGSS.HS-PS1-4

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

Where does a substrate bind to an enzyme?

• Active site

• Allosteric site

• Activation site

• R group site

How does a noncompetitive inhibitor decrease reaction rates?

• Binds to the active site, causing direct interference with enzyme-substrate interaction.

• Binds to the allosteric site, causing a conformational change that alters the active site.

• Increasing the free energy of the enzyme so that the reaction is no longer spontaneous.

• Decreases the substrate concentration in the cell so that the reaction will not progress quickly.

Tags

NGSS.HS-PS1-2

Why is ATP hydrolysis frequently coupled to endergonic reactions in a cell? Select all that apply.

• ATP hydrolysis is exergonic.

• ATP hydrolysis is an anabolic reaction.

• The products of ATP hydrolysis have more complexity than the reactants.

Tags

NGSS.HS-PS1-4

In an exergonic reaction:

• Energy is released; entropy increases

• Energy is released; entropy decreases

• Energy is stored in the products; entropy increases

• Energy is stored in the products; entropy decreases.

The process of breaking down large molecules

• Anabolism
• Catabolism
• Condensation

• Synthesis

Tags

NGSS.HS-LS1-7