Enzymes (2.5)

Question 1

What is the active site of an enzyme?

Answer 1

The active site of an enzyme is where substrates bind.

Question 2

What are enzymes?

Answer 2

Enzymes are globular proteins that increase the rate of a biochemical reaction by lowering the activation energy threshold

Question 3

What is a substrate?

Answer 3

A substrate is what binds to the active site and is converted to a product by an enzyme.

Question 4

What is enzyme-substrate specificity?

Answer 4

An enzyme will only bind to the substrate whose shape matches that of its active site.

Question 5

What is the lock and key model?

Answer 5

The lock and key hypothesis states that the active site and substrate match each other in two ways; structurally and chemically. Structurally, only a specific substrate fits into an active site. Chemically, only substrates that are chemically attracted to the active site will react.

Question 6

What is collision?

Answer 6

Collision is the coming together of a substrate molecule and an active site.

Question 7

What is the induced fit model?

Answer 7

In the induced fit model, the active site changes shape to fit the substrate. This stresses the active site and lowers the activation energy.

Question 8

What factors effect enzyme activity?

Answer 8

Temperature, pH, and substrate concentration