Quaternary Struc

Question 1

What are the forces that stabilise interactions between proteins and protein subunits

Answer 1

Noncovalent interactions

Question 2

Why do polypeptide chains associate?

Answer 2

To perform a variety of functions

Question 3

How are Metabolic pathways organised?

Answer 3

By the association of a number of separate polypeptides

Question 4

why are metabolic pathways organised the way they are

Answer 4

Allows efficient channelling of pathway intermediates from one enzyme to the next

Question 5

Name some quaternary complexes

Answer 5

Collagen, DNA Pol3 holoenzyme of Ecoli, Ribsomal complexes

Question 6

ATCase is an example of what

Answer 6

Allosteric regulation

Question 7

what is allosteric regulation

Answer 7

regulation of a protein by binding an effector molecule at a site other than the protein’s active site

Question 8

ATCase catalyzes a reaction in what

Answer 8

pyrimidines

Question 9

What two things can bind to ATCase

Answer 9

ATP and CTP

Question 10

ATCase activity is inhibited by what and activated by what

Answer 10

Inhib by CTP and Act by ATP so they compete for the same site on the same thing

Question 11

Allosteric regulation involves what

Answer 11

Changes quarternary structure- rearrangement of subunits in T to R transition