Mechanism of Enzyme Action

Question 1

What is activation energy?

Answer 1

This is the minimum extra energy required by a reacting molecule to get converted into a product.

Question 2

State Fischer’s Lock and Key theory

Answer 2

It states that the active site of an enzyme has a conformational shape that compliments the shape of the binding substrate.

Question 3

What is the active site of an enzyme?

Answer 3

This is the part of the enzyme where substrate molecules bind and a chemical reaction takes place

Question 4

What is the Allosteric site of an enzyme?

Answer 4

This is the part of the enzyme that allows the changing of the shape of the active site thereby inhibiting enzyme activity

Question 5

State Koshland’s induced-fit theory

Answer 5

It is an enzyme-substrate interaction that states that the active site of the enzyme will undergo a conformational change to attain an optimal fit for the binding substrate

Question 6

The protein part of an enzyme is called _____________

Answer 6

Apoenzyme or Apoprotein

Question 7

A complete active enzyme is called a ___________

Answer 7

Holoenzyme

Question 8

The non-proteinous parts of an enzyme are called ___________

Answer 8

Co-factors

Question 9

Non-proteinous parts of an enzyme are of two types __________ and ____________

Answer 9

Organic (Coenzymes)
Inorganic (Ions)

Question 10

What are metalloenzymes?

Answer 10

These are enzymes with a definite quantity of functional metal ions that are retained throughout

Question 11

What are isoenzymes?

Answer 11

These are enzymes that exist in multiple forms within a single species of organism or in a single cell

Question 12

Isoenzymes are otherwise called _________

Answer 12

Isozymes

Question 13

5 uses of enzymes

Answer 13

Used in diagnosis of diseases
Used in beverages and food industries
Used in laundry
Used in manufacturing industries
Used in drugs and pharmaceutical companies
Speed up reaction in biological system