Biological Molecules

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  • Created by: L.Brady
  • Created on: 09-11-15 18:44
what is the basic monomer unit in carbohydrates?
Monosaccharides
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what is a condensation recation?
a reaction in which two molecules are linked together and a water molecule is removed.
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what is the reverse of condensation?
hydrolysis
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what are the 3 elements that all carbohydrates contain?
carbon, hydrogen and oxygen
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what type of sugar is glucose, give its formula.
hexose, C6 H12 O6
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when monsaccharides are joined together what bond is made?
glycosidic bond
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name the 3 monosaccharides
Glucose, Fructose, Galactose
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name the 3 disaccharides
maltose, sucrose, lactose
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what is oxidation and reduction?
oxidation is the loss of elctrons, reduction is the gain of elctrons.
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Name the test for reducing sugars and describe it.
Benedict test...
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what is benedicts reagent?
Copper (II) Sulfate - and alkaline solution
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benedicts reagent + reducing sugar =
insoluable red precipatate of Coper (I) Oxide
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For non reducing sugars what else do we do?
add dilute HCL, put back in water bath for 5 minutes. Add sodium hydrogencarbonate to neualise HCL. add BR and blace back in water bath.
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name 3 polysaccharides
Starch, Glycogen, Cellulose
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Starch
alpha glucose- stargae in plants
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glycogen
alpha glucose- storage in animals
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cellulose
beta glucose- in plants for cell walls
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starch is a micture of what?
amylose and amylopectin
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Test for starch
Iodine- pottasium iodide changes from orange to clue/black.
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what are the two Lipid groups?
Trigylcerides and Phospholipids
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what is triglyceride made up of?
1 molecule of glycerol and 3 fatty acids
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what isa phospholipid made up of?
2 fatty acids, phosphate group and glycerol
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test for lipids
grind sample, add ethanol, shake test tube, add water. A white emulsion indicates the presence of a lipid.
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what are proteins?
polymers of amino acids
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what is a protein specifically made up of?
r group, amine group (H2N), acid group (COOH), H
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Other cards in this set

Card 2

Front

what is a condensation recation?

Back

a reaction in which two molecules are linked together and a water molecule is removed.

Card 3

Front

what is the reverse of condensation?

Back

Preview of the front of card 3

Card 4

Front

what are the 3 elements that all carbohydrates contain?

Back

Preview of the front of card 4

Card 5

Front

what type of sugar is glucose, give its formula.

Back

Preview of the front of card 5
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