Exploring Biomolecules in High School Biology

Which of the following is not a component of all living cells?

• DNA

• Cell membrane

• Nucleus

• Benedict's reagent

What is used as a source of protein in the lab?

• Gelatin powder

• Corn syrup

• Vegetable oil

• Iodine

Which reagent is used to test for the presence of simple sugars?

• Biuret

• Benedict's

• Sudan IV

• Iodine

What color indicates a positive protein test with Biuret reagent?

• Orange

• Red

• Lavender

• Black

During the lipid test, what indicates a positive result?

• Greasy spot on paper

• Precipitate formation

• Color change to black

• Color change to orange

What does a black color change in the starch test indicate?

• Absence of sugars

• Presence of starch

• Presence of proteins

• Presence of lipids

Which biomolecule was not found in the unknown sample?

• Proteins

• Lipids

• Simple sugars

• Starches

What was the identity of the unknown sample tested in the lab?

• Corn syrup

• Dry powdered milk

• Vegetable oil

• Gelatin powder

Which of the following is a correct pair of substance and its testing reagent?

• Sugar and iodine

• Starch and Biuret

• Protein and Benedict's

• Lipid and paper bag

What safety equipment is necessary when handling the lab reagents?

• Goggles

• All of the above

• Gloves

• Lab coat