Unit 3; Concept 1: Enzymes and biochemical Reactions

In the picture above, what is happening to the enzyme in the second step? 

• Chemical bonds are being broken in the substrate. 
• Product is being broken in two. 
• Substrate is beginning to bond to the enzyme. 
• None of the above. 

Tags

NGSS.HS-PS1-4

What is another word for "substrate?" 

• Solvent 
• Product 
• Solute 
• Reactant 

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

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

Tags

NGSS.HS-PS1-4

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. 

Tags

NGSS.HS-PS1-5

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

Tags

NGSS.HS-PS1-4

What phrase best describes an exothermic reaction? 

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

Tags

NGSS.HS-PS1-4

The activation energy can be decreased if a _______ is involved

• Product 
• Substrate
• Reactant 
• Catalyst

Tags

NGSS.HS-PS1-4

Chemical reactions change ________ and form __________

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

Tags

NGSS.HS-PS1-2