Enzymes 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

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 .
  

Tags

NGSS.MS-PS1-2

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

• 15^oC
• 40^oC
• 30^oC
• 35^oC

Tags

NGSS.HS-PS1-5

Babies do not have well developed digestive systems for breaking down proteins; therefore baby food is prepared after treatment with which enzyme? 

• protease
• lipase
• carbohydrase
• synthase

Which statement best describes the enzyme represented in the graphs below? 

• This enzyme works best at a temperature of 35 C and a pH of 8
• This enzyme works best at a temperature of 50 C and a pH of 12
• Temperature and pH have no influence on the activity of this enzyme
• This enzyme works best at a temperature above 50 C and a pH above 12

Many coenzymes are

• metals
• vitamins
• proteins
• substances

How do competitive inhibitors affect enzymes?

• It binds to the active site, blocking the substrate
• It changes the shape of the enzyme
• It increases the activation energy
• It decreases the activation energy

Tags

NGSS.HS-PS1-5

A series of enzymes catalyze the reaction X->Y->Z->A.  Product A binds to the enzyme that converts X to Y at a position remote from its active site.  This binding decreases the activity of the enzyme.

• Substance X is a coenzyme
• Substance A is the substrate
• Substance A is an allosteric inhibitor
• Substance X is the product

Tags

NGSS.HS-LS1-3

what impedes enzymatic reactions by binding to another part of the enzyme?

• noncompetative inhibitor
• competative inhibitors
• coenzymes
• cofactors