Flashcards in  Class 5- Theisen Fundametal Of Nutrition Deck (141)
Ex of oligosaccharide:
Glycolipids and glycoproteins
Ex of polysaccharides:
Glycogen, starch, cellulose
Diastereomers that differ in configuration of only one stereogenic (chiral) center
What is more stable open-chain or ring structure?
Monosaccharides exist in sol'n mainly as _____ structure?
How are glycosidic bonds formed?
By the hydrolysis of starch
A polysaccharide of glucose residues linked w/ a alpha 1,4 glycosidic bond
Amylose w/ addition of alpha-1,6 glycosidic branch
Major plant polysaccharide
Unbranded polymer of glucose residues joined by ß-1,4 linkages, allowing to form very long and straight chains
Why does cellulose/starch and glycogen favor bent structure ?
More suitable for storage
Major component of DNA
Components of glycoproteins and glycolipids
Important in cell signaling, adhesion
Acetylated Amino sugars
Glycosaminoglycans and proteoglycans. Present in cell membrane and in ECM
Constituted the gangliosides in oligodendrocytes of NS
Food additives, gains importance in uncontrolled diabetes leading to cataracts and peripheral neuropathy; used in synthesis of lipids
Why is high fructose corn syrup so fattening?
It bypasses a major regulatory step in glycolysis, entering at step 5 [DHAP=easily converted to glycerol-becomes fat easily] This disrupts fuel metabolism and increases productions of lipids since DAG can be converted to glycerol-3-phosphate and then into triacylglycerols
What is the catch w/ the glycemic index?
I only measures BG levels and b/c it is low in glucose doesnt mean it is low in kcal
Are artificial sweeteners on Glycemic index?
Yes and theyre > 0
What can stimulate insulin release
Modified sugar alcohols
What's the good sweetener?
Stevia 0 kcal and natural sugar
Water insoluble biomolecules that're highly soluble in organic solvents
FA are key constituents
_________ properties of lipids are d/t the FAs
What contributes hydrophobic properties f lipid?
What're building blocks of phospholipids and glycolipids, components of biological membranes?
What type of FA have highest energy?
Critical enzyme for lipid digestion
Where are FA oxidized to generate ATP?