1.3 Carbohydrates - disaccharides and polysaccharides

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  • Created by: Dane
  • Created on: 30-11-19 12:11
Gluecose joins to gluecose to form
maltose
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Gluecose joins to fructose to form
sucrose
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gluecose joins to galactose to form
lactose
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When monosaccharides join what is formed and what type of reaction is this called
Water, Condensation reaction
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What type of bond is formed
glycosidic bond
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what happens when water is added to a disaccharide
it breaks the glycosidic releasing the consituent monosaccharides
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what is this reaction known as
hydrolysis
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How do we detect whether a disaccharide is a reducing sugar
benedicts test
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whats an example of a disaccharide and a reducing sugar
maltose
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what is an example of a non reducing sugar that is a disaccharide
sucrose
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What is a polysaccharide
it is a polymer formed by combining together many monosaccharide molecules
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what type of reaction is requuired for monosaccharides to bond
condensation reactions
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what type of bonding is formed
glycosidic
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because polysaccharides are large they are...
insoluble
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because they are are large what feature does this make them good at
storage
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what happens when they are hydrolysed
polysaccharides breakdown into disacchrides or monosaccharides
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Instead of using this feature for storage what does the polysaccharide cellulose use it for
to give structural support to a plant cell
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where and how is startch found
in many parts of plants, in the form of small granules and grains
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how many glycosidic bonds are needed to form starch
200 -100,00
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what molecule acts as the monomer for this bond
alpha-gluecose
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what sort of bonding is used
glycosidic
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what type of reaction happens
condensation reaction
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What is the test for starch
it is detected by its ability to change the colour of the iodine in potassium iodine solution from yellow to blue black
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what is the process of the test for starch
1.) Place 2cm^3 of the sample being tested into a test tube (or add two drops of the sample into a depression on a spotting tile) 2.) Add two drops of iodine solution, shake or stir 3.)The presence of starch is indicated by a blue-black coloration
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Other cards in this set

Card 2

Front

Gluecose joins to fructose to form

Back

sucrose

Card 3

Front

gluecose joins to galactose to form

Back

Preview of the front of card 3

Card 4

Front

When monosaccharides join what is formed and what type of reaction is this called

Back

Preview of the front of card 4

Card 5

Front

What type of bond is formed

Back

Preview of the front of card 5
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