Presence and action
of salivary amylaseamylaseamylaseamylase
and the effect of pHpHpHpH
Main previous concepts: Starch / A...
1 2 3 4
Water Bread
water
Bread
water
saliva
Bread
water
saliva
acid
Iodine test
(adding
Lugol)
Colour
Test result
+ or - ...
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Presence and action of salivary amylase and the effect of pH

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Lab amylase

Presence and action
of salivary amylase
and the effect of pH


Main previous concepts: Starch / Amylase / Iodine test
Starch (or amylum) is a carbohydrate consisting of a large number of glucose units joined together.
Amylase is an enzyme that breaks starch down into sugar. Amylase is present in human saliva, where it begins the chemical process of digestion.

Amylase splits starch to glucose.

The Iodine test (or lugol) is used to test for the presence of starch.
Iodine solution reacts with starch producing a blue black color.

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Transcript of "Presence and action of salivary amylase and the effect of pH"

  1. 1. Presence and action of salivary amylaseamylaseamylaseamylase and the effect of pHpHpHpH Main previous concepts: Starch / Amylase / Iodine test Starch (or amylum) is a carbohydrate consisting of a large number of glucose units joined together. Amylase is an enzyme that breaks starch down into sugar. Amylase is present in human saliva, where it begins the chemical process of digestion. Amylase splits starch to glucose. The Iodine test (or lugol) is used to test for the presence of starch. Iodine solution reacts with starch producing a blue black color. MATERIALSMATERIALSMATERIALSMATERIALS. (Drawing and name of materials)
  2. 2. 1 2 3 4 Water Bread water Bread water saliva Bread water saliva acid Iodine test (adding Lugol) Colour Test result + or - ? Presence of starch? RESULTSRESULTSRESULTSRESULTS Explain the results for each tube. http://www.biotopics.co.uk/nutrition/amylex.html http://www.biologyjunction.com/amylase_on_starch_lab.htm http://www.medbio.info/Horn/Sugars4Kids/flour_and_wood.htm

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