Carbohydrates Flashcards
The prefixes D - and L - found in the complete name of a monosaccharide are used to identify one of two possible isomeric forms called?
stereoisomers
must have the same molecular formula and the same bonding
stereoisomers
The only atom in the plane of the paper is the?
stereocenter
the study of the different spatial arrangements of atoms
Stereochemistry
Non-superimposable mirror images
Enantiomers
a monosaccharide that, when written as a Fischer projection, has the -OH group on its penultimate carbon to the right.
D-Monosaccharide
a monosaccharide that, when written as a Fischer projection, has the -OH group on its penultimate carbon to the left.
L-Monosaccharide
The three most abundant hexoses in the biological world are?
D-glucose, D-galactose, and D-fructose
by far the most abundant of the three
Glucose
is also known as dextrose because it is dextrorotatory.
Glucose
Molecules above
Chiral
Any object or molecule with plane of symmetry is
Achiral
are said to be optically active
Enantiomers
Some compounds rotate light in a clockwise direction
dextrorotatory(D)
Other substances rotate light in a counter clockwise direction.
Levorotatory(L)
dextrorotatory(D) and are designated by a
plus sign (+ )
levorotatory (L) and are indicated by a
minus sign (-)
Simplest carbohydrate
D-glyceraldehyde
Most important in diet
D-glucose
Sweetest of all sugars
D-fructose
Part of milk sugar
D-galactose
Used in RNA
D-ribose
was the first to see a relationship between the structure of a compound and the effect of that compound on plane-polarized light.
Louis Pasteur
Louis Pasteur
1848
Pasteur noticed that salts of tartaric acid were formed as a by-product.
Winemaking
devised a simple way to represent the structure of stereoisomers.
Emil Fischer
is a two-dimensional drawing of a molecule that shows a chiral carbon at the intersection of two lines.
Fischer Projection
represent bonds projecting out of the page, and the vertical lines represent bonds that project into the page.
The horizontal lines
Almost all carbohydrates in living systems are members of the
D-family
use for obesity
Dexfenfluramine
for pain
Ibuprofen
for antibiotic
Levofloxacin
For Psychiatric depression
Paroxetine
AIDS
Indinavir
Staple food
Starch
Structural and protective elements
Cellulose
Unrefined sugar from palm sap
Jaggery
Ophyroscolex species
Protozoan
General formula of carbohydrates
CnH2nOn
Greek word of sugar/saccharide
Sakcharon
Five carbon sugar molecules
Pentoses
Found in hearts muscles
D-lyxose
8 components of glycoproteins
D-xylose and D-Arabinose
Also known as D-Glucose
Hexoses
A ubiquitous fuel in biology
Glucose
metabolic diseases in which a person has high blood sugar, either because the body does not produce enough insulin, or because cells do not respond to the insulin that is produced.
Diabetes Mellitus
presence of glucose in the urine
Glycosura
less sweet than glucose
Galactose
Inherited disease
Galactosemia
increase concentration in blood and urine
Galactusuria
- inherited disease
- fructose intolerance
Fructosemia
also known as cane sugar
Sucrose
- also known as maltobiose or malt sugar
- the disaccharide produced when amylase breaks down starch
Maltose
Dental plaque
Streptococcus mutans
Main storage polysaccharide of animal cells
Glycogen
A long chain polymer of a N-acetyiglucosamine, a derivative of glucose
Chitin