Enzymes Review

What is the purpose  of an enzyme?

• give permission for the reaction
• raise activation energy
• speed up reactions
• control how many reactions occur

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NGSS.MS-LS1-7

Enzymes are capable of increasing the rate of a chemical reaction within a living cell.  Enzymes accomplish this through which of the following means?

• reducing the number of products   
• reducing the activation energy
• increasing the temperature of the cell
• increasing the concentration of reactants 

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NGSS.HS-PS1-4

NGSS.HS-PS1-5

What is structure A?

• Substrate
• Active site
• Enzyme
• Products

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NGSS.MS-LS1-7

What is structure D?

• Substrate
• Active site
• Enzyme
• Products

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NGSS.MS-LS1-2

What is structure C?

• Substrate
• Active site
• Enzyme
• Products

Tags

NGSS.MS-PS1-5

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.

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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 .
  

What happens when enzymes are heated to a high temperature?

• The enzymes die.

• The shapes of the enzyme are altered or denatured

• The enzymes' amino acid sequence changes.

• The enzymes remain the same

Which of these is most likely an enzyme?  

• Sucrose
• Galactose
• Fructose
• Amylase

Tags

NGSS.MS-LS1-7

Fill in the blank: Enzymes act as __________ which speed up chemical reactions.

• Competitors

• Co enzymes

• Catalysts

• Tiny sumo wrestlers