Enzymes

Enzymes are considered to be 

• Lipids
• Carbohydrate
• Protein
• Nucleic Acid

What is the purpose  of an enzyme?

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

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 

Where do substrates bind on an enzyme?

• voltage-gated channels
• surface receptor
• calcium channels
• active site

What is structure A?

• Substrate
• Active site
• Enzyme
• Products

What is structure C?

• Substrate
• Active site
• Enzyme
• Products

What is structure E, F, G?

• Substrate
• Active site
• Enzyme
• Products

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.

Which chemical is classified as an enzyme?

• Galactose
• Lipid
• Protease
• Manganese dioxide

Which of the following statement suggests that the shape of an enzyme determines the enzyme's function? 

• enzymes can operate in a wide range of conditions
• enzymes are specific to a substrate
• enzymes are activated by neighboring molecules