enzymes

Question 1

what is an enzyme

Answer 1

A biological catalyst made up of large protein molecules

Question 2

what is the induced fit model

Answer 2

This is where the active site before a reaction is not complementary to a substrate but as the substrate binds the active site changes shape and becomes complementary

Question 3

Define denature

Answer 3

The active site of an enzyme is permanently altered and is no longer complementary to its substrate

Question 4

An enzyme is a globular protein true or false

Answer 4

True

Question 5

How does an increase in temperature affect enzyme action

Answer 5

An increase in temperature would result in an increase in kinetic energy and therefore an increase in successful collisions.
- A rise in temp makes the enzymes molecules vibrate more. If too high temperature the vibrations will break the bonds that hold the enzymes in shape

Question 6

How does PH affect enzyme action

Answer 6

Above and below the optimum ph H+ ions and OH- ions found in acids and alkalis can disrupt the ionic and hydrogen bonds that hold the structure in place

Question 7

What is a competitive inhibitor

Answer 7

It is a molecule with a similar shape to the substrate so can temporarily bind to the active site

Question 8

What is a non competitive inhibitor

Answer 8

Bind to an enzyme away from its active site. This permanently alters the shape of the active site

Question 9

What is the induced fit model

Answer 9

Before a reaction the active site is not complementary to the substrate but upon binding the active site becomes complementary