Give the name of one or more polysaccharides that matches each of the following descriptions:
b. contains only ß(1→4)-glycosidic bonds

Question

Give the name of one or more polysaccharides that matches each of the following descriptions:

b. contains only ß(1→4)-glycosidic bonds

Accepted Answer

Hi, everybody. Welcome back. Our next question says from the following list, select the polysaccharide or polysaccharides that contain only beta 1 to 4 glyco cytic bonds. And the list is number one glycogen, number two cellulose, number three amylase and number four Amy. So let's work our way through each of these. So, glycogen is that molecule that's used to store sugar in animals and it's a branching polymer of glucose. And because it's branching, we know that it can't contain only one type of gly acidic bond because when you get to a branch point, you have to have a different bond. And that is indeed the case with glycogen. So in Glycogen is mostly alpha 1 to 4 glyco bonds with some alpha 1 to 6 bonds and that would be at the branch points. So you could see that glycogen there is not our answer. Cross out. Number one, number two says cellulose, well, cellulose does not have branches, it's in a straight line. So start there and it does have only beta 1 to 4 gly acidic bonds. So we have our answer or, but we do have the option of more than one correct answer because our question said like the polysaccharide or polysaccharides. So we'll circle number two and then move on and see if any of those also qualify. So choice three is Ayo, that's part of the components of starch and alos is the straight chain. There's no branching, but the monomers of Amy are connected by alpha 1 to 4 gly acidic bonds. So we can go ahead and eliminate Amy and then draw four Amya. This does have a branching structure and then alpha 1 to 4 gly acidic bonds. So it has some alpha 1 to 6 like a set of bonds that represent the branch points. And then of course, the rest with alpha 1 to 4 gly acidic bonds. And you can help remember that by looking at a melos and Amy lope which begin with a and I can remind you that they have the alpha version there. Let's just briefly touch on what we can remember about the difference between alpha and beta bonds there. When we have the alpha version, think of alpha, think of letter A, it's a vowel like opposite. So alpha goes with the opposite and it means that that uh oxygen outside the ring. So attached to the anomic carbon is on the opposite side of the ring from that last C h2o H carbon group. And then we have beta, which like letter be is a consonant. So we think of same, which is also starts with the consonant. And that means that, that oh outside of the ring on C one. So when looking at this list, the polysaccharide that has only beta 1 to 4 glyco bonds is number two cellulose. See you in the next video.

Give the name of one or more polysaccharides that matches each of the following descriptions:
b. contains only ß(1→4)-glycosidic bonds

Verified video answer for a similar problem:

Key Concepts

Polysaccharides

Glycosidic Bonds

Cellulose

Give the name of one or more polysaccharides that matches each of the following descriptions:b. contains only ß(1→4)-glycosidic bonds

Verified video answer for a similar problem:

Key Concepts

Polysaccharides

Glycosidic Bonds

Cellulose

Give the name of one or more polysaccharides that matches each of the following descriptions:
b. contains only ß(1→4)-glycosidic bonds