CARBOHYDRATES Flashcards
term for SACCHARIDE or SUGAR
carbohydrates
the GENERAL FORMULA of carbohydrates
Cn(H2O)n
a compound that YIELDS POLYHYDROXY ALDEHYDES OR KETONES upon hydrolysis
carbohydrates
provides SHORT-TERM ENERGY reserve
carbohydrates
carbohydrate that contains a SINGLE polyhydroxy aldehyde or polyhydroxy ketone
monosaccharide
carbohydrate that contains 2 TO 10 MONOSACCHARIDE units covalently bonded to each other
oligosaccharides
polymeric carbohydrate that contains as MANY MONOSACCHARIDE UNITS covalently bonded to each other
polysaccharides
hydrolysis of carobhydrates?
polysaccharides to oligosaccharides to monosaccharide
a monosaccharide that contains an ALDEHYDE FUNCTIONAL GROUP
aldose
monosaccharide that contains a KETONE FUNCTIONAL GROUP
ketose
substance rotates polarized LIGHT TO THE LEFT
levorotatory
substance rotates polarized LIGHT TO THE RIGHT
dextrorotatory
are images that COINCIDE AT ALL POINTS when the images are laid upon each other
superimposable
are mirror images where NOT ALL POINTS COINCIDE when the images are laid upon each other
nonsuperimposable
has 4 DIFFERENT ATOMS bonded to the carbon
chiral
DOES NOT HAVE 4 DIFFERENT ATOMS or groups bonded to the carbon
achiral
an ATOM IN A MOLECULE that has 4 different groups tetrahedrally bonded to it
chiral center
MOLECULE whose mirror images are NOT SUPERIMPOSABLE
chiral molecule
MOLECULE whose mirror images ARE SUPERIMPOSABLE
achiral molecule
ISOMERS that have the SAME MOLECULAR AND STRUCTURAL FORMULAS but differ in the orientation of atoms in space
stereoisomers
what are the subtypes of stereoisomers?
enantiomers and diastereomers
ENANTIOS opposite
enantiomers
STEREOISOMERS whose molecules are NONSUPERIMPOSABLE
enantiomers
are STEREOISOMERS whose molecules are NOT MIRROR IMAGES of each other
diastereomers
a two dimensional structural notation for showing the SPATIAL ARRANGEMENT of groups about chiral centers in molecules
fischer projection formula
when a molecule has MORE THAN ONE CHIRAL CARBON, each carbon can possibly be arranged in either the right-hand or left-hand form
2n rule
a two dimensional structural notation that specifies the THREE-DIMENSIONAL STRUCTURE of a cyclic form of a monosaccharide
haworth projection
6 membered ring
pyranose
5 membered ring
furanose
what are the 3 acidic sugars?
aldonic acid, alduronic acid, aldaric acid
uses WEAK OXIDIZING AGENT
aldonic acid
USES ENZYMES
alduronic acid
uses STRONG OXIDIZING AGENT
aldaric acid
used as a SWEETENING AGENT in chewing gum
d-sorbitol
a component of RNA and energy-rich compounds such as ATP
d-ribose
it means MINUS AN OXYGEN
deoxy
is synthesized from glucose in the MAMMARY GLAND for use in lactose
d-galactose
sometimes called BRAIN SUGAR because it is a component of glycoproteins found in the brain and nerve tissue
d-galactose
a component of glycoproteins FOUND IN BRAIN AND NERVE TISSUE
brain sugar
are DIASTEREOMERS whose molecules DIFFER ONLY IN THE CONFIGURATION at one chiral center
epimers
aka DEXTROSE, BLOOD SUGAR, GRAPE SUGAR
d-glucose
is biochemically the MOST IMPORTANT KETOHEXOSE
d-fructose
also known as LEVULOSE AND FRUIT SUGAR
d-fructose
used as a DIETARY SUGAR not because it has fewer calories per gram than other sugars but because less is needed
d-fructose
the bond in a DISACCHARIDE resulting from the reaction between THE HEMIACETAL CARBON ATOM
glycosidic linkage
also known as MALT SUGAR
maltose