Question

Question to solve.

Which list CORRECTLY ranks the polarity, from most polar to least polar, for the listed substances?

1. cholesteryl-ester > bile salts > cholesterol

1. cholesterol > bile salts > cholesteryl-esters

1. bile salts > cholesteryl-esters > cholesterol

1. cholesteryl-esters > cholesterol > bile salts

1. bile salts > cholesterol > cholesteryl-esters

2.) Which amino acid is NOT capable using its side chain (R group) to participate in general acid-base catalysis?

	a.	His
	b.	Asp
	c.	Thr
	d.	Ile
	e.	Lys

Answer 1

question i) bile salts > cholesterol > cholesteryl-esters

because bile salt contain many hydroxyl group in its structure than cholestrol and ester. the choestrol contain hydroxyl group which make it more polar than its ester and we know that ester has only act as hydrogen acceptor where as alchol act as both acceptor as well as donar of hydrogen bonds.

question 2)  isoleucin is capable using its side chain (R group) to participate in general acid-base catalysis