Unit 1 - Chapter 5 - Enzymes

Question 1

The active site:

Answer 1

The active site is a soecial pocket or cleft in the enzyme molecule

Question 2

Enzyme-substrate (ES) complex;

Answer 2

The substrates binds the enzyme, forming and enzyme-substrate (ES) complex

Question 3

Enzyme-product (EP) complex

Answer 3

ES (enzyme-substrate) complex is cinverted to EP complex that subsequently dissociates to enzyme and product

Question 4

Turnover number;

Answer 4

The number of molecules of substrate converted to the product per enzyme molecule per second is called turn over number, or k(cat)

Question 5

Holoenzymes:

Answer 5

Refers to the active enzyme with its non-protein component

Question 6

Apoenzymes:

Answer 6

Are inactive enzymes without its nonprotein moiety

Question 7

Coenzyme;

Answer 7

Is when the nonpolar moiety is a small organic compound

Question 8

Cofactor:

Answer 8

Is when the nonprotein moiety is ametal ion (eg Zn+ or Fe2+)

Question 9

Where are coenzymes commonly derived from?

Answer 9

Vitamins (eg NAD+ contains niacin, and FAD contains riboflavin

Question 10

What are enzymes?

Answer 10

Enzymes are protein catalysts that increase the rate of reactions withiut being changed in the overall process.