Select all that are true about the different types of polysaccharides. (There may be more than one correct answer).
1. Glycogen is only a branched chain polysaccharide of glucose molecules attached by alpha 1,6 bonds.
2. Glycogen has both linear and branched chains of glucose molecules
3. Cellulose has beta 1,4 linkages that cannot be properly digested
4. Cellulose has beta 1,4 linkages that are easily digested
5. Starch is a linear chain of glucose molecules attached by alpha 1,4 bonds

The correct answer is 2, 3 and 5.

Explanation:

Glycogen: This is a branched biopolymer that consists of linear chains of glucose residue that are linked together by alpha 1,4 glycosidic bonds. Branches are linked to the chains from which they are branching off by alpha 1,6 glycosidic bonds between the first glucose on the new branch and a glucose on the stem chain.

Cellulose: This is a structural polysaccharide that is found in cell walls of plants and it acts as dietary fiber when consumed. Cellulose has beta 1,4 linkages that can not be properly digested.

Starch: This is a linear chain of glucose molecules attached by alpha 1,4 bonds

True statements are

2.Glycogen has both linear and branched chains of glucose molecules.

3.Cellulose has beta 1,4 linkages that cannot be properly digested

Explanation:

Glycogen is a branched polysaccharide consisting of linear chains of glucose  with an average chain length of approximately 8–12 glucose units. Glucose units are linked together linearly by α(1→4) glycosidic bonds from one glucose to the next glucose. Branches are linked to the chains from which they are branching off by α(1→6) glycosidic bonds between the first glucose of the new branch and a glucose on the stem chain.Glycogen is a polysaccharide of glucose that serves as a form of energy.The polysaccharide structure represents the main storage form of glucose in the body.

Cellulose is the other major plant polysaccharide. It is the major constituent of plant cell walls. Cellulose is composed on unbranched, linear chains of D-glucose , linked to one another by beta(1-4) glycosidic bonds, which no vertebrate has the capacity to enzymatically digest. Herbivores can largely digest it themselves, because their digestive tracts have microbes that produce cellulases that hydrolyze cellulose.

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