Postlab midterms Flashcards
(32 cards)
THEY ARE THE KEY SOURCE OF
ENERGY USED BY LIVING THINGS.
CARBOHYDRATES
CARBOHYDRATES ALSO SERVES AS ________
EXTRACELLULAR STRUCTURAL ELEMENTS
THEY ARE DEFINED AS THE POLYHYDROXY ALDEHYDES OR POLYHYDROXY KETONES.
CARBOHYDRATES
USED IN THE HUMAN BODY
D-GLUCOSE
SIMPLE SUGARS ENDS WITH _______
–OSE
Contains One unit of sugar
SIMPLE SUGAR
Contains more than 1 unit of sugar
COMPLEX SUGAR
CONTAIN ONE MONOSACCHARIDE UNIT
MONOSACCHARIDES
CONTAIN TWO MONOSACCHARIDE UNITS.
DISACCHARIDES
CONTAIN 3-9 MONOSACCHARIDE
OLIGOSACCHARIDES
CAN CONTAIN MORE THAN 9 MONOSACCHARIDE UNITS.
OLIGOSACCHARIDES
COMPLEX CARBOHYDRATES CAN BE BROKEN DOWN INTO SMALLER SUGAR UNITS THROUGH A PROCESS KNOWN AS
HYDROLYSIS.
IT CONTAINS A CARBONYL GROUP ATTATCHED TO TWO R GROUPS HAVING ONE OR MORE HYDROXYL
GROUPS.
KETOSE
IS A COLORLESS LIQUID BUT TENDS
TO TURN BROWN UPON PROLONGED EXPOSURE ON
AIR AND MOISTURE.
FURFURAL
PHENOLIC COMPOUNDS WILL REACT WITH FURFURAL OR HYDROXYMETHYL FURFURAL IN THE PRESENCE OF ACID TO FORM COLORED CONDENSATION PRODUCTS. (T/F)
TRUE
IT IS PRODUCED BY REMOVING WATER FROM OR DEHYDRATING FIVE-CARBON SUGARS SUCH AS XYLOSE AND ARABINOSE.
FURFURAL
THE GENERAL TEST TO DETECT THE PRESENCE
OF CARBOHYDRATES
MOLISCH TEST
MOLISH TEST: MONOSACCHARIDE GIVES A _____ POSITIVE TEST, DISACCHARIDES AND POLYSACCHARIDES REACT ________.
RAPID
SLOWER
POSTITIVE RESULT FOR MOLISH TEST
PURPLE COLOR/ RING
TEST IS USED TO DISTINGUISH BETWEEN PENTOSE AND HEXOSE MONOSACHARIDES.
BIAL’S TEST
POSITIVE RESULT FOR BIAL’S TEST
PENTOSE - BLUE-GREEN COMPLEX (ARIBINOSE)
HEXOSE - BROWN COMPLEX
TEST IS USED TO DISTINGUISH BETWEEN ALDOSES (LIKE GLUCOSE) AND KETOSES (LIKE FRUCTOSE).
SELIWANOFF’S TEST
RESULTS FOR SELIWANOFF’S TEST
POSTIVE (KETONES) - Cherry Red Color
NEGAITVE (Lactose/Glucose) - No Change
THEY ARE CAPABLE OF TRANSFERRING HYDROGEN TO OTHER COMPOUNDS. THEY ALSO HAVE A FREE CARBONYL GROUP, ONE THAT CAN REACT WITH AN
OXIDIZING AGENT.
REDUCING SUGARS
