Enzymes

What is the energy needed to start an chemical reaction referred to?

• Cascading Energy
• Potential Energy 
• Kinetic Energy
• Activation energy

Enzymes work by

• Increasing membrane permeability

• Decreasing the rate of diffusion

• Lowering activation energy

• Increasing active transport

The enzyme known as ‘catalase’ is involved in the breakdown of hydrogen peroxide molecules into separate water and oxygen molecules. During this reaction, what happens to the ‘catalase’?

• The enzyme would become products: O2 and H20
  
• The enzyme would be fully used up and discarded.
• The enzyme would remain unchanged and reusable

• The enzyme would denature

The enzyme known as ‘catalase’ is involved in the breakdown of hydrogen peroxide molecules into separate water and oxygen molecules. What type of reaction is this?

• A digestion and catabolic reaction
  

• A digestion and anabolic reaction

• A synthesis and catabolic reaction

• A synthesis and anabolic reaction

Phosphorylase is an enzyme present in potatoes that joins glucose (monosaccharides) together to make starch (amylose), a polysaccharide. What type of reaction is this?

• A digestion and catabolic reaction
  

• A digestion and anabolic reaction

• A synthesis and catabolic reaction

• A synthesis and anabolic reaction

What is being represented by the letter A in the image?

• Substrate
• Enzyme
• Product
• Complex

What is being represented by the letter B in the image?

• Substrate
• Enzyme
• Substrate
• Product

If an enzyme becomes over heated what effect, if any, will the heat have on the enzymatic activity? 

• The enzyme will not store much chemical energy.
• The enzyme will denature and will not be able to catalyze reactions.

• The enzyme will lose its net electrical charge.

• The enzyme will lose stored genetic information.

Which type macromolecule are enzymes?

• Carbohydrate

• Protein

• Lipid

• Nucleic Acid

What is the optimum pH of enzyme A?

• 2

• 6

• 8

• 10

• 14