Macromolecule Post Lab Quiz

Benedict's indicator is used to test for a macromolecule: Green, Yellow, Orange, or Red are positive reactions. Which sample is Positive? H2O, Oil, Lettuce, or Gelatin.

• Lettuce

• Oil

• H2O

• Gelatin

Biuret solution is used to indicate the presence of a macromolecule. If they are present the solution turns purple. What sample in this picture is positive for Proteins? H2O, Oil, Gelatin, or Lettuce.

• Oil

• H2O

• Gelatin

• Lettuce

Iodine is used to indicate the presence of a macromolecule buy turning the solution into a dark blue-black. Which sample in the picture is positive? H2O, Potato, Apple juice, or Honey.

• H2O

• Potato

• Apple juice

• Honey

What does a lipid do when exposed to a Sudan III?

• It dissolves

• Becomes transparent

• Turns red

• Turns violet

If Benedict's indicator is used to detect carbohydrates in samples, what real world medical tests could this indicator be used in?

• Diabetic blood sugar test

• Cholesterol blood test

• Urinary tract infections, caused by proteins

• Genetic screening

Benedict's Solution is the test for ...

• Simple sugars like glucose

• Starch

• Protein

• Nucleic Acids

Biuret Reagent is a test for ...

• Simple sugars like glucose

• Starch

• Protein

• Nucleic Acid

Lugol's solution (or Iodine) is a test for ...

• Simple Sugars like glucose

• Starch

• Protein

• Nucleic Acid

A sample in a lab tested positive for 2 of the 3 macromolecule tests. Benedict's = Blue, Iodine = Black-Blue, Biuret = Purple. What 2 macromolecules are present?

• Carbohydrate and a Starch

• Starch and a Protein

• Starch and a Lipid

• Carbohydrate an a Protein

In our lab experiment, the only biomolecule that almost all students found was missing in the Happy Meal was

• lipids

• protein

• simple sugar

• starch