Quiz #2 - pH, Biochem & Enzymes (including lab #2)

What type of macromolecule are enzymes?

• Protein
• Carbohydrate
• Lipid
• Nucleic Acid

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

Which of the following correctly describes how enzymes work?  

• they lower the energy of the reactants to increase the rxn rate
• they supply energy to the reaction to increase the rxn rate
• they lower the energy of the products to increase the rxn rate
• they lower the activation energy of the reaction to increase the rxn rate

Tags

NGSS.HS-PS1-4

The part of the enzyme that the substrate bonds to is called the _____.

• active site
• activation energy
• bond site
• peptide bond

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 and salinity can denature enzymes.

• Enzymes speed up chemical reactions.

Tags

NGSS.HS-PS1-2

If a mutation occurs in a DNA sequence that codes for an enzyme, what is the most likely result?

• There will likely be no change in the shape and function of the enzyme.

• The enzyme will most likely fold in a way that makes its shape incompatible with the substrate and the enzyme will not function correctly.

• The enzyme will not be produced at all.

• The enzyme will have an enhanced ability to bind with the substrate.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

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.
• Enzyme decrease the activation energy of the reaction.
• Enzymes reverse the direction of the reaction.

Tags

NGSS.HS-PS1-4

The alteration of the active site allowing the enzyme and it’s substrate to fit together better

• denature

• induced fit

• activation energy

• peptide bond

What is the substrate in the chemical reaction that will occur in the lab?

• Water

• Liver

• Catalase

• Peroxide

• Oxygen

What are the products in the chemical reaction that will occur in the lab? (Select as many as apply.)

• Water

• Liver

• Catalase

• Peroxide

• Oxygen

Which is the chemical formula for hydrogen peroxide?

• H₂O₂

• H₂O

• O₂

• HPO₂