Testing for Macromolecules and Lab Safety

The video tutorial covers a lab session on testing for macromolecules, specifically carbohydrates, proteins, and lipids. It includes safety instructions and detailed procedures for conducting tests using Benedict's solution for simple sugars, PC solution for proteins, and iodine for starch. The video also demonstrates lipid tests using paper and ethanol. Students are instructed to test known and unknown samples and complete lab reports.

Which of the following is NOT one of the macromolecules mentioned in the lab introduction?

• Proteins

• Vitamins

• Carbohydrates

• Lipids

What safety equipment is emphasized for use during the lab?

• Gloves

• Safety glasses

• Lab coat

• Face mask

What solution is used to test for the presence of simple sugars?

• PC solution

• Ethanol

• Benedict's solution

• Iodine

What color change indicates the presence of proteins when using the PC solution?

• Purple

• Blue

• Orange

• Green

What happens when lipids are rubbed on green paper?

• The paper becomes opaque

• The paper becomes translucent

• The paper dissolves

• The paper changes color

What is observed when vegetable oil is mixed with ethanol?

• They form beads resembling glass

• They form a cloudy solution

• They do not mix

• They change color

What reagent is used to test for the presence of starch?

• Benedict's solution

• Ethanol

• Iodine

• PC solution

What color does iodine turn in the presence of starch?

• Red

• Blue

• Black

• Yellow

Which of the following is NOT a known substance to be tested in the lab?

• Peanut butter

• Apple juice

• Milk

• Sand

What is the final step after completing all tests in the lab?

• Discuss results with peers

• Submit the lab report

• Dispose of all chemicals

• Clean up and store supplies