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2.3
Enzymes and the digestive system
12
Biology
12th Grade
12/06/2012

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Cards

Term
What bond binds 2 monosaccharides? 
Definition
The bind is called a Glycosidic Bond 
Term
What is hydrolysis
Definition
The addiotion of water that causes breakdown 
Term
Glucose + Glucose =
Definition
Maltose 
Term
What is a Polysaccharide?
Definition
A Polysaccharide is many monosaccharide molecules combined together. 
Term
what is a Disaccharide?
Definition
Disaccharide is a pair of monosaccharides combined together. 
Term
What is a Condensation Reaction
Definition
Condensation Reaction is when a molecule of water is removed.
Term
Glucose + Fructose =
Definition
Sucrose
Term
Glucose + Galactose =
Definition
Lactose
Term
Waht is the test for Starch?
Definition

Place 2cm3 of the sample into a test tube 

Add 2 drops of Iodine Solution and shake 

And if the soultion turns blue-black the starch is present

As a control repeat the test but use water instead of the sample

Term
what is the test for Non-Reducing Sugars
Definition

Put the food sample in a test tube 

Add the same amount of Benedict's reagent

And heat it up by using a water bath - if  non reducing sugar is not present (still a blue colour)

Then another 2cm of the food sample to 2cm of (dilute) hydrochloric acid in a test tube

 Add sodium hydrogencarbonate to the test tube to neutralise the acid 

Now re-test the solution by heating it with the 2cm3 of Benedict's reagent for 5 mins,

 the solution turn orange-brown/brick red because reducing sugars are present

Term
What is a monomer?
Definition
A molecule that can be bonded to other identical molecules to form a polymer.
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