Enzyme Review

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 

Tags

NGSS.HS-PS1-5

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.

Tags

NGSS.HS-PS1-4

Based on their role in the cell, enzymes can also be classified as –

• inhibitors
• catalysts
• sources of energy
• vitamins

An enzyme is a

• carbohydrate.

• protein.

• lipid.

• nucleic acid.

The region on the surface of the enzyme that the substrate binds to is the

• active site.

• activation energy.

• lock-and-key model.

• catalysis.

Enzymes act as catalysts to __________ the rate of a biochemical reaction by ___________ the activation energy needed for the reaction to occur.

• increase, lowering

• decrease, lowering

• increase, raising

• decrease, raising

Tags

NGSS.HS-PS1-5

Enzymes belong to which family of biomacromolecules?

• Protein

• Carbohydrate

• Nucleic acid

• Lipids

In the diagram, what is letter A? 

• product
• substrate
• enzyme-substrate complex
• active site

Tags

NGSS.HS-LS1-7

Letter D...

• active site
• enzyme
• substrate
• products