chapter 6 Flashcards
what’s a positive control and give an example of it for the macronutrient lab
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
Define negative control and give an example of it from the macronutrient lab
a test in a lab that is intended to yield a negative result
ex. distilled water for any of the macronutrient tests
what are the 4 macromolecules that are commonly tested
starch
sugar
protein
fat
what is the test for starch and what’s the expected color change
Iodine
Yellow to
Brown, Black
what is the test for sugar and what’s the expected color change
Benedict
Blue to Red, Yellow, Green
what is the test for fat and what’s the expected color change
Brown paper
opaque to translucent
what is the test for protein and what’s the expected color change
Biuret
Blue to Pink, Purple