Macromolecule Lab Quiz: Questions with Verified
Solutions 2024 Update.
When Benedict reagent is added to a solution containing simple sugars, the solution turns
green, orange, or red. In the absence of simple sugars, the solution is blue. Benedict reagent
was added to solutions that may or may not contain simple sugars. The data can be seen in the
table below. The color change that occurs is considered the
A. Control variable.
B. Dependent variable.
C. Unknown variable.
D. Independent variable. - Correct answer- B. Dependent variable.
Which of the following tests requires heating prior to observing results?
A. Brown paper test
B. Biuret test
C. Wendelspecht test
D. Benedict's test
E. Iodine test - Correct answer- D. Benedict's test
Proteins are polymers composed of
A. Monosaccharides.
B. Fatty acids.
C. Nucleotides.
D. Nucleic acids.
, Macromolecule Lab Quiz: Questions with Verified
Solutions 2024 Update.
E. Amino acids. - Correct answer- E. Amino acids.
While testing for an emulsifier, one of the test tubes showed a layer of oil sitting on top of the
water. What property of lipids causes this to occur?
A. Lipids are larger molecules than water molecules.
B. Lipids contain carbon while water molecules do not.
C. Lipids are only found in solid form, not liquid form.
D. Lipids are nonpolar and so do not mix with polar water molecules.
- Correct answer- D. Lipids are nonpolar and so do not mix with polar water molecules.
Which reagent is used to detect the presence of starch?
A. Iodine
B. Biuret
C. Benedict's
D. Phenol red
E. Sudan IV - Correct answer- A. Iodine
Which color change represents a positive reaction for the presence of sugar using the
Benedict's test?
A. Yellow to purple
B. Yellow to clear
Solutions 2024 Update.
When Benedict reagent is added to a solution containing simple sugars, the solution turns
green, orange, or red. In the absence of simple sugars, the solution is blue. Benedict reagent
was added to solutions that may or may not contain simple sugars. The data can be seen in the
table below. The color change that occurs is considered the
A. Control variable.
B. Dependent variable.
C. Unknown variable.
D. Independent variable. - Correct answer- B. Dependent variable.
Which of the following tests requires heating prior to observing results?
A. Brown paper test
B. Biuret test
C. Wendelspecht test
D. Benedict's test
E. Iodine test - Correct answer- D. Benedict's test
Proteins are polymers composed of
A. Monosaccharides.
B. Fatty acids.
C. Nucleotides.
D. Nucleic acids.
, Macromolecule Lab Quiz: Questions with Verified
Solutions 2024 Update.
E. Amino acids. - Correct answer- E. Amino acids.
While testing for an emulsifier, one of the test tubes showed a layer of oil sitting on top of the
water. What property of lipids causes this to occur?
A. Lipids are larger molecules than water molecules.
B. Lipids contain carbon while water molecules do not.
C. Lipids are only found in solid form, not liquid form.
D. Lipids are nonpolar and so do not mix with polar water molecules.
- Correct answer- D. Lipids are nonpolar and so do not mix with polar water molecules.
Which reagent is used to detect the presence of starch?
A. Iodine
B. Biuret
C. Benedict's
D. Phenol red
E. Sudan IV - Correct answer- A. Iodine
Which color change represents a positive reaction for the presence of sugar using the
Benedict's test?
A. Yellow to purple
B. Yellow to clear
