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Food Tests

questions on the experiment

QuestionAnswer
What is starch A polysaccharide
To test for starch Use iodine
If starch is present Yellow/ brown iodine changes to blue/black
What control can be used when testing for starch? Water
When testing for fat use.. Brown paper
The see through spot left by fat is called .. A translucent spot
What control is used when testing for fat.... water on brown paper
How is a translucent spot observed? Hold it up to the light.
Examples of reducing sugars include.. Glucose, Lactose and Maltose
What is a reducing sugar... A small sugar which is free to bind with Benedict's solution
To test for Glucose use.. Benedict's solution
If glucose is present ... Benedict's solution changes colour from blue to brick red
When testing for glucose what control is used? Water
Which food test requires heat? Glucose
To test for protein use... Biuret reagent
If protein is present Biuret reagent changes from ... blue to purple
Biuret reagent is corrosive. What does this mean? It can cause burns
Created by: PDST Biology