Enzyme Activity and Inhibition Quiz

What are cofactors in the context of enzymes?

• They are the main components of enzymes.

• They are the helpers of enzymes, such as ions and vitamins.

• They are the products of enzyme reactions.

• They are the inhibitors of enzymes.

What is the role of inhibitors in enzyme activity?

• They increase enzyme activity.

• They have no effect on enzyme activity.

• They lower enzyme activity.

• They convert enzymes into cofactors.

Which of the following is a type of enzyme inhibitor?

• Cofactor

• Substrate

• Competitive inhibitor

• Product

What is the role of competitive inhibitors in enzyme activity?

• Bind to the enzyme active site and compete with the substrate

• Bind to the enzyme outside of its active site

• Increase enzyme activity

• Alter the enzyme shape so substrate cannot bind

How do noncompetitive inhibitors affect enzyme activity?

• Bind to the enzyme active site and compete with the substrate

• Bind to the enzyme outside of its active site and alter the enzyme shape

• Increase enzyme activity

• Bind to the substrate directly

What is feedback inhibition in enzyme activity?

• The substrate inhibits the enzyme

• The product of the reaction is the inhibitor

• The enzyme inhibits itself

• The enzyme is activated by the product

What is the role of negative feedback in a reaction?

• It speeds up the production of more products.

• It acts as an inhibitor to slow or pause the production of more products.

• It has no effect on the reaction.

• It changes the substrate into a different product.

Which factor does NOT affect enzyme activity?

• Temperature

• pH

• Substrate color

• Salt concentration

What is one way to measure reaction rate?

• By the color change of the solution

• By the appearance of products

• By the sound produced during the reaction

• By the smell of the reaction mixture