BIO 1B Chemical Reactions & Enzymes Review

In chemical reactions, atoms are

• created
• destroyed
• rearranged
• neutralized

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NGSS.HS-PS1-7

When hydrogen and oxygen combine to form water, water is

• a product
• a reactant
• an enzyme
• a catalyst

Identify the reactant(s) in the chemical reaction, CO₂ + H₂O ---> H₂CO₃

• CO₂, H₂O, and H₂CO₃
• CO₂ and H₂O
• H₂CO₃
• CO₂

What is the process that changes one set of chemicals into another set of chemicals?

• cohesion

• hydrogen bonding

• chemical reaction

• dissolving

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Chemical reactions that release energy

• will not occur.
• need catalysts to occur.
• will always explode.
• often occur spontaneously.

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NGSS.HS-PS1-4

What type of reaction is the one pictured?

• Energy absorbing.
• Energy releasing.

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NGSS.HS-PS1-4

What type of reaction is the one pictured?

• Energy absorbing.
• Energy releasing.

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NGSS.HS-PS1-4

Which of the following statements about enzymes is NOT true?

• Enzymes work best at a specified pH.
• All enzymes have the same shape as their substrates. 
• Enzymes are proteins.
• The shape of an enzyme allows it to do its job. 

Which of the following statements is true about catalysts?

• Catalysts slow down the rate of chemical reactions.
• All catalysts are enzymes.
• Catalysts are used up during a chemical reaction.
•   Catalysts lower the activation energy of a chemical reaction.  
  

Tags

NGSS.HS-PS1-5

A substance that speeds up the rate of a chemical reaction is called

• a catalyst.
• a lipid.
• a molecule.
• an element.

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NGSS.HS-PS1-5