Enzymes STAAR

What is the most likely result if the shape of the enzyme changes?

• The substrate will change its shape to match the enzyme.

• The enzyme will no longer be able to catalyze the reaction with the substrate.

• The products made from the enzyme and the substrate will be changed.

• The enzyme will be able to bind to more diverse substrates than before

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 .
  

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

• Enzymes increase the energy of the reactants.

• Enzymes decrease the energy level of the products.

• Enzymes decrease the activation energy of the reaction.

• Enzymes reverse the direction of the reaction.

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

• 15^oC

• 40^oC

• 30^oC

• 35^oC

Which of these factors can affect the initial rate of an enzyme reaction?

• Enzyme concentration

• Substrate concentration

• Temperature

• pH

• All of the above

Which part of the enzyme is responsible for its catalytic activity?

• Substrate

• Active site

• Inhibitor

• Coenzyme

SC. 912.L.18.1 Some proteins catalyze biochemical reactions. If a genetic defect prevented a protein catalyst from being produced, which of the following do you predict would happen in the cell?

• The cell would find a different type of protein to catalyze the reaction.

• The reaction the protein catalyzes would proceed very slowly or not at all.

• The reaction the protein catalyzes would only occur in some places in the cell.

• The reverse reaction of the one the protein catalyzes would begin to proceed.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

Which best explains why the rate of a biochemical reaction decreases at high temperatures?

• The activation energy increases.

• The shape of the enzyme changes.

• The enzyme-substrate complex forms.

• The bonds between substrates are broken.

Which best explains why the rate of biochemical reaction decreases at high temperatures?

• The activation energy increases

• The shape of the enzyme changes

• The enzyme-substrate complex forms

• The bonds between substrates are broken

Enzymes are a form of which biomolecule?

• Carbohydrates

• Proteins

• Nucleic Acids

• Lipids