Unit E: Enzymatics

Question 1

What word refers to all of the chemical changes that occur within a cell?

Answer 1

Metabolism

Question 2

What do you call an organic catalyst (usually a protein) that speeds up a reaction in cells due to its particular shape?

Answer 2

Enzyme

Question 3

What do you call the reactants in an enzymatic reaction?

Answer 3

Substrates

Question 4

What is a non-protein organic molecule that aids the action of the enzyme to which it is loosely bound?

Answer 4

Co-enzyme

Question 5

What do you call the energy that must be added to cause molecules to react with one another?

Answer 5

Energy of Activation (Ea)

Question 6

What do you call the series of linked reactions, beginning with a particular reactant and terminating with an end product?

Answer 6

Metabolic pathway

Question 7

What do you call the region on the surface of an enzyme where the substrate binds and where the reaction occurs?

Answer 7

Active site

Question 8

What do you call the change in the shape of an enzyme’s active site which enhances the fit between the enzyme’s active site and its substrates?

Answer 8

Induced fit model

Question 9

What do you call the loss of an enzyme’s normal shape so that it no longer functions; caused by a less than optimal pH and temperature?

Answer 9

Denatured.

Question 10

What are the means by which cells regulate enzyme activity; there is competitive and non-competitive inhibition

Answer 10

Enzyme inhibition

Question 11

What do you call the non-product adjunct required by an enzyme in order to function (non-organic)

Answer 11

cofactor

Question 12

What do you call the essential organic requirement in the diet, needed in small amounts. They are often part of coenzymes.

Answer 12

Vitamins