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Biology Review Terms
Basic Definitions
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10th Grade
05/08/2016

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Term
ORGANIC COMPOUND
Definition
  • COMPOUNDS THAT CONTAIN CARBON AND USUALLY HYDROGEN
  • EXAMPLES: CARBOHYDRATES, PROTEINS, LIPIDS, AND NUCLEIC ACIDS
Term
INORGANIC COMPOUND
Definition
  • COMPOUNDS THAT, FOR THE MOST PART, DO NOT CONTAIN CARBON
  • EXCEPTIONS: CARBON DIOXIDE, CARBON MONOXIDE, AND OTHERS
Term
CARBONYL GROUP
Definition
  • MAKES A COMPOUND HYRDOPHILIC AND POLAR
  • EXAMPLES: ALDEHYDE (C=O group is at the end of chain) AND KETONE (C=O group is anywhere but at en of chain)
Term
CARBOXYL GROUP
Definition
  • A CARBONYL GROUP WITH AN -OH AT THE END
  • FOUND IN AMINO ACIDS
  • COMPOUNDS CONTAINING CARBOXYL GROUPS ARE KNOWN AS CARBOXYLIC ACIDS
Term
HYDROXYL GROUP
Definition
  • IS PRESENT IN COMPOUNDS KNOWN AS ALCOHOLS
  • THE STRUCTURE IS R-OH
  • MAKES A COMPOUND POLAR AND HYDROPHILIC
Term
PHOSPHATE GROUP
Definition
  • SERVES AS A CELLULAR ENERGY SOURCE (ADP, ATP, AND GDP)
  • IS ACIDIC
  • R-O-PO3
Term
LIPID
Definition
  • AN ORGANIC COMPOUND USED BY CELLS AS LONG-TERM ENERGY STORES OR BUILDING BLOCKS
  • IS HYDROPHOBIC AND INSOLUBLE IN WATER
  • MOST IMPORTANT LIPIDS: FATS, OILS, STEROIDS, PHOSPHOLIPIDS
Term
FATS
Definition
  • ARE MADE BY COMBINING GLYCEROL AND THREE FATTY ACIDS
  • MORE EFFECTIVE MEANS OF STORING ENERGY THAN CARBOHYDRATES 
  • TWO MAIN TYPES: SATURATED AND UNSATURATED 
Term
SATURATED FATS
Definition
  • CONTAINS NO DOUBLE BONDS (ANIMAL FAT)
  • ASSOCIATED WITH HEART DISEASE AND ATHEROSCLEROSIS
Term
UNSATURATED FAT
Definition
  • CONTAINS ONE OR MORE DOUBLE BONDS (PLANT FAT)
Term
STEROID
Definition
  • A LIPID COMPOSED OF FOUR CARBON RINGS THAT LOOK LIKE CHICKEN-WIRE FENCING IN PICTORIAL REPRESENTATIONS 
  • EXAMPLES: CHOLESTEROL, TESTOSTERONE, ESTROGEN, PROGESTERONE
Term
PHOSPHOLIPID
Definition
  • A LIPID FORMED BY COMBINING A GLYCEROL MOLECULE WITH TWO FATTY ACIDS AND A PHOSPHATE GROUP
  • HAS A HYDROPHOBIC TAIL AND A HYDROPHILIC HEAD
  • IS THE MAJOR COMPONENT OF CELL MEMBRANES
Term
MONOSACCHARIDE
Definition
  • SIMPLER CARBOHYDRATE
  • MONOSACCHARIDES WITH 5 CARBONS ARE USED IN RNA AND ATP
  • EXAMPLE: GLUCOSE
Term
DISACCHARIDE
Definition
  • A SUGAR CONSISTING OF TWO MONOSACCHARIDES BOUND TOGETHER
  • EXAMPLES: SUCROSE, MALTOSE, AND LACTOSE
Term
POLYSACCHARIDE
Definition
  • A CHARBOHYDRATE CONTAINING 3 OR MORE MONOSACCHARIDES LINKED TOGETHER
  • EXAMPLES: STARCH (STORAGE IN PLANTS), CELLULOSE (USED FOR PLANTS FOR CELL WALL FORMATION), AND CHITIN (PART OF EXOSKELETONS OF ARTHROPODS)
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