chapter 6 Flashcards

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1
Q

what’s a positive control and give an example of it for the macronutrient lab

A

a positive control is a result that is expected to test positive in a lab

ex. substance with protein causes the biuret test to be pink/purple

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2
Q

Define negative control and give an example of it from the macronutrient lab

A

a test in a lab that is intended to yield a negative result

ex. distilled water for any of the macronutrient tests

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3
Q

what are the 4 macromolecules that are commonly tested

A

starch
sugar
protein
fat

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4
Q

what is the test for starch and what’s the expected color change

A

Iodine

Yellow to
Brown, Black

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5
Q

what is the test for sugar and what’s the expected color change

A

Benedict

Blue to Red, Yellow, Green

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6
Q

what is the test for fat and what’s the expected color change

A

Brown paper

opaque to translucent

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7
Q

what is the test for protein and what’s the expected color change

A

Biuret

Blue to Pink, Purple

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