Concept 1-2 review

If the activation energy is lowered, the reaction will take...

• More energy 
• Less energy
• The same amount of energy
• No energy

The molecule that an enzyme binds to is known as the...

• Product 
• Active site
• Activation energy
• Substrate 

The area on the enzyme where the reactant binds to is called the...

• Activation energy
• Active site
• Substrate
• Product 

On the graph above, an increase in temperature results in....

• A decrease in the activation energy. 
• A decrease in the reaction rate. 
• An increase in activation energy. 
• An increase in the reaction rate. 

Which phase best describes an endothermic reaction? 

• Absorbs more energy than it releases. 
• Releases more energy than it absorbs. 
• Nothing changes
• In a state of equilibrium

What phrase best describes an exothermic reaction? 

• Absorbs more energy than is released. 
• Releases more energy than absorbed.
• Nothing changes
• State of equilibrium

 Identify the products in this reaction:
6H₂O + 6CO₂ → C₆H₁₂O₆ + 6O₂

• C₆H₁₂O₆ + 6O₂
• 6H₂O + 6CO₂
• 6O₂
•  6H₂O

 Identify the reactants in this reaction: 
6H₂O + 6CO₂ → C₆H₁₂O₆ + 6O₂

• 6CO₂
• 6O₂
• 6H₂O + 6CO₂
•  C₆H₁₂O₆ + 6O₂

The activation energy can be decreased if a _______ is involved

• Product 
• Substrate
• Reactant 
• Catalyst

Chemical reactions change ________ and form __________

• reactants; products
• matter; gas
• matter; matter 
• enzymes; products