Exploring the Role and Function of Enzymes

How do enzymes affect the activation energy of a reaction?

• They eliminate it

• They decrease it

• They increase it

• They have no effect

Tags

NGSS.HS-PS1-5

What analogy is used to explain activation energy in the video?

• A mountain climb

• A car race

• A roller coaster ride

• A swimming pool

What is the primary role of enzymes in chemical reactions?

• To slow down reactions

• To increase the activation energy

• To act as a reactant

• To speed up reactions without being consumed

Tags

NGSS.HS-PS1-5

What happens to enzymes when there are large changes in temperature?

• They speed up

• They become more efficient

• They slow down

• They denature and lose function

Which enzyme is responsible for unzipping DNA strands?

• Lactase

• Amylase

• Helicase

• ATP synthase

What is the first step in the enzyme action process?

• The enzyme releases the products

• The substrate binds to the active site

• The enzyme forms a new molecule

• The enzyme changes shape

What is formed when the enzyme changes shape during the reaction?

• Enzyme-inhibitor complex

• Enzyme-product complex

• Enzyme-substrate complex

• Enzyme-reactant complex

What happens in the final step of the enzyme action process?

• The enzyme forms a new molecule

• The enzyme changes shape

• The enzyme binds to the substrate

• The enzyme releases the products

Which enzyme breaks down lactose?

• Lactase

• Amylase

• Helicase

• ATP synthase

Why are individuals who are lactose intolerant unable to digest lactose?

• They have a deficiency in helicase

• They lack the enzyme lactase

• They have too much lactase

• They have an excess of ATP synthase