Chapter 4

Question 1

6 main roles of proteins

Answer 1

-enzymes, storage and transport. physical cell support and shape, mechanical movement, decoding cell info, hormones and hormone receptors

Question 2

largest and smallest protein name and size

Answer 2

smallest-insulin-51 amino acids long

largest-titin-30,000 amino acids

Question 3

proteins have non covalent forces which means it

Answer 3

stabilizes the specific structures of the protein

Question 4

proteins are marginally stable which means

Answer 4

stability is defined as the tendency to maintain their native conformation

Question 5

the protein conformation with the lowest free energy is

Answer 5

the most stable and has the maximum number of weak interactions

Question 6

The stability of a protein is not the sum of the energies of formation of weak interactions rather

Answer 6

the difference in the free energies of the folded and unfolded states

Question 7

folded proteins are different because

Answer 7

they occupy a low energy state that makes the native structure most stable

Question 8

what forms a protein to give it its “tertiary structure”

Answer 8

individual secondary structures form first then hydrophobic core condenses it all

Question 9

protein folding and unfolding is

Answer 9

a cooperative process

Question 10

denaturization

Answer 10

disruption of native conformation with loss of activity