Enzymes

When substrates react they need

• sufficient energy.

• effective collisions.

• correct orientation.

• all the above.

Enzymes are protein ___________ which speed up chemical reactions in biological systems by lowering the activation energy and not getting used up.

Maltase is able to breakdown maltose, but not lactose because

• Maltase is only specific to maltose and sucrose.

• Maltase lacks the necessary enzymes to break down lactose.
• Maltase lacks the necessary active site for the glucose-galactose bond.

• Maltase has a different primary amino acid sequence.

The model used to explain the most efficient enzyme action is (the)

• "Lock and Key" model

• "Induced-fit" model

• both.

• "Induced-Key" model

In the diagram, what number corresponds to the enzyme-substrate complex?

• 1

• 2

• 3

• 4

• 5

In the diagram, what number corresponds to the apoenzyme?

• 1

• 2

• 3

• 4

• 5

In the diagram, what number corresponds to the cofactor/coenzyme?

• 1

• 2

• 3

• 4

• 5

What does the rate of reaction curve for pH look like?

Answer explanation

The rate of reaction curve looks like a hyperbola with an optimum (max value).

Which factor has the greatest influence on a rate of reaction in a biological system?

• Temperature

• pH

• enzyme concentration

• substrate concentration

The diagram shows the action of a

• competitive inhibitor.

• Non-competitive Inhibitor

• reversible inhibitor.

• non-reversible inhibitor.