Module 4: Plant Chemical Composition Flashcards

1
Q

test for sugars

A

benedict’s test

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2
Q

use for testing presence of starch

A

iodine solution

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3
Q

testing presence of proteins

A

biuret’s test

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4
Q

process of buiret’s test

A

4 mL 10% sodium hydroxide (OH) solution, few drops of 1% copper sulfate (CuSO4)

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5
Q

test for presence of fats

A

grease spot’s test

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6
Q

benedict’ test color changes

A
  • blue - none
  • green - traceable
  • yellow - low
  • orange - moderate
  • red - high
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7
Q

positive iodine test

A

blue/purple

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7
Q

positive biuret test color

A

purple

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7
Q

negative iodine test color

A

yellow/brown

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8
Q

negative biuret test color

A

blue

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