Enzyme

What are enzymes primarily made of?

• Carbohydrates
  

• Proteins

• Lipids

• Nucleic acids

Enzymes increase the rate of a reaction by:

• Raising the activation energy

• Reducing the activation energy

• Changing the equilibrium

• Increasing substrate concentration

The reactant in an enzyme-catalyzed reaction is called the:

• Product

• Substrate

• Cofactor

• Active site

The specificity of an enzyme for its substrate is known as:

• Induced fit

• Active site binding

• Molecular recognition

• Conformational change

Which bonds link amino acids in enzymes?

• Hydrogen bonds

• Peptide bonds

• Ionic bonds

• Van der Waals forces

Where does the substrate bind on the enzyme?

• Allosteric site

• Active site

• Cofactor site

• Binding domain

Which interaction is NOT involved in substrate binding to the active site?

• Ionic bonds

• Hydrogen bonds

• Covalent bonds

• Van der Waals forces

What type of amino acids within the active site assist catalysis by forming covalent bonds with substrates?

• Polar amino acids

• Nucleophilic amino acids

• Hydrophobic amino acids

• Aromatic amino acids

Which factor is NOT likely to affect enzyme activity?

• Temperature

• Substrate concentration

• Color of the solution

• pH

What happens to enzyme activity if the temperature exceeds the optimum?

• Activity increases indefinitely

• The enzyme becomes denatured

• The enzyme becomes inactive but returns to normal

• Activity remains constant