Question

1. Which of the following molecules has the greatest number of non-reducing ends?

A)glycogen

B)chymotrypsin

C)amylopectin

D)cellulose

E)palmitate

F)amylose

G)None of these have a non-reducing end

2. for the same molecules which has the greatest number of reducing ends?

A)glycogen

B)chymotrypsin

C)amylopectin

D)cellulose

E)palmitate

F)amylose

G)None of these have a reducing end

Answer 1

1a. Glycogen

Reducing sugars are sugars where the anomeric carbon has an OH group attached that can reduce other compounds. Non-reducing sugars do not have an OH group attached to the anomeric carbon so they cannot reduce other compounds. .glycogen branches more abundantly than amylopectin, with branches at every eight to twelve residues. As a result, it has many more nonreducing ends.

Cellulose are long, straight, unbranched chains forming H-bonds with the adjacent chains.

2a. Glycogen

Having many reducing ends, glycogen is more readily broken down in cases in which an animal needs a sudden burst of energy.