If the mystery food sample contained the nutrient, then it would change to the same color as the indicator.✔ positive control.negative control.
Justify your answer.
The mystery food sample did test positive for Sudan red. Nicole ate salad dressing, which contains fat, a lipid. She is the likely culprit.
Check all facts below that you included in your explanation.
Select question dadd78e5
Based on the data you collected, who likely left the the classroom mess? Zack✔ NicoleChristianAbigail
Check all facts below that you included in your explanation.
What is the name of the glass container above that you used to heat water?
The data above indicate an error. How do you know? What might have caused the error?
Water is a negative control and should not test positive for protein, meaning it should have remained blue (the color of the Biuret reagent) rather than turning pink or purple. This error indicates that the sample was likely contaminated with protein or that the test tube was mislabeled.
Which possible errors did you include in your response? Check all that apply.
Question text not available
lemon juice✔ meatmilk
To determine if the substance in the first test tube above is indeed a meat, you could also test it using ✔ Biuret solution.Lugol's solution.Benedict's solution.Sudan red.
Why was a beaker used for heating the solution?
✔ olive oilX orange juicebleach
sulfuric acidammonia✔ tomatoes
You tested for the presence of four different indicators✔ nutrientscolor changes by adding
✔ indicatorsnutrientscolor changes to the three test tubes.
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