Match each term with its description. (a) Enantiomers (b)...

Match each term with its description. (a) Enantiomers_____ (b) Cellulose_____ (c) Lectins_____ (d) Glycosyltransferases_____ (e) Epimers_____ (f) Starch_____ (g) Carbohydrates_____ (h) Proteoglycan_____ (i) Mucoprotein_____ (j) Glycogen_____ 1. Has the molecular formula of $\left(\mathrm{CH}_{2} \mathrm{O}\right)_{n}$ 2. Monosaccharides that differ at a single asymmetric carbon atom 3. The storage form of glucose in animals 4. The storage form of glucose in plants 5. Glycoprotein containing glycosaminoglycans 6. The most abundant organic molecule in the biosphere 7. N-Acetylgalactosamine is a key component of this glycoprotein 8. Carbohydrate-binding proteins 9. Enzymes that synthesize oligosaccharides 10. Stereoisomers that are mirror images of each other

Match each term with its description.
(a) Enantiomers_____
(b) Cellulose_____
(c) Lectins_____
(d) Glycosyltransferases_____
(e) Epimers_____
(f) Starch_____
(g) Carbohydrates_____
(h) Proteoglycan_____
(i) Mucoprotein_____
(j) Glycogen_____
1. Has the molecular formula of $\left(\mathrm{CH}_{2} \mathrm{O}\right)_{n}$
2. Monosaccharides that differ at a single asymmetric carbon atom
3. The storage form of glucose in animals
4. The storage form of glucose in plants
5. Glycoprotein containing glycosaminoglycans
6. The most abundant organic molecule in the biosphere
7. N-Acetylgalactosamine is a key component of this glycoprotein
8. Carbohydrate-binding proteins
9. Enzymes that synthesize oligosaccharides
10. Stereoisomers that are mirror images of each other

Key Concepts

Carbohydrates

Carbohydrates are organic molecules that generally follow the empirical formula (CH2O)n. They serve as a major source of energy for living organisms, play key roles in cell signaling and structure, and are integral to many biological processes.

Stereochemistry in Carbohydrates

Stereochemistry involves the spatial arrangement of atoms within molecules. In carbohydrates, this is especially important because many sugars have multiple chiral centers. Enantiomers are stereoisomers that are non-superimposable mirror images of each other, while epimers are diastereomers that differ in configuration at only one chiral center.

Polysaccharides

Polysaccharides are long carbohydrate polymers that consist of many monosaccharide units linked by glycosidic bonds. They serve various functions, including energy storage in forms such as starch in plants and glycogen in animals, as well as providing structural support, as seen in cellulose in the biosphere.

Carbohydrate-Binding Proteins (Lectins)

Lectins are proteins that specifically bind to carbohydrate moieties. They play critical roles in cell-cell recognition, immune responses, and signaling pathways by interacting with specific sugar residues on cellular surfaces.

Glycosyltransferases

Glycosyltransferases are enzymes that catalyze the transfer of sugar moieties from activated donor molecules to specific acceptor molecules, forming glycosidic bonds. This enzymatic process is vital for the synthesis of complex carbohydrates, oligosaccharides, and glycoconjugates.

Glycoproteins and Proteoglycans

Glycoproteins are proteins that have carbohydrate groups covalently attached to them, which can affect the protein's folding, stability, and function. Proteoglycans are a specialized type of glycoprotein that are heavily glycosylated with glycosaminoglycan chains, playing key roles in the extracellular matrix and cellular signaling.

Transcript

00:05 Looking at our first vocabulary word, we have the word carbohydrate.

00:10 And if we listen to carbohydrate, it tells us that we have carbon, hydrate, water, h2o.

00:21 Now, to make this a general formula, we have to apply this for any number of carbons.

00:27 So any number of carbons would be n.

00:29 So we just take this and we go ahead and place it in parentheses and put our n or on the outside.

00:36 That gives us our general formula.

00:39 And it doesn't matter if we have six carbons, it would be c6, h12 .06.

00:48 If we had three carbons, c3h603.

00:54 Again, it doesn't matter how many carbons we have.

00:57 So our first word carbohydrates would go with letter g.

01:08 As we look to our second vocabulary word we have and the term is epamere and epamere vary at a single asymmetric carbon and that should be vary vary a very at a single asymmetric carbon that's what an epamere is and when we look at our monosaccharides let's look at the example d -glucoase which has the formula c -h -i -r -eh -i -e o, c, bonded to our hydrogen, and then we're bonded to our hydroxyl.

02:06 Adjust our screen just a little bit.

02:08 There we go.

02:11 Bonded to one, two, three.

02:20 Sorry, let's back this up in the second i got off there.

02:25 We need, our second one needs to be an oh, then to the hydrogen, then to our carbon.

02:35 Carbon oh again, carbon oh, and then our ch2oh.

02:47 And now we can fill in the other side, hydrogen, hydroxyl, hydrogen.

02:54 And if we compare that to de manos, again, we're going to still have that same cho, or carbon.

03:11 And if we look, we can see that we have this carbon right here is different.

03:41 So these become epameres.

03:45 And if we added a third one, we could look at degalactose.

03:59 And again, we have our c -h -o followed by our.