A Scientist Observed a Chemical That Changes to Bright Red

A scientist observed a chemical that changes to bright red in the presence of organic compounds containing nitrogen and phosphorus. To test this chemical, a set of test tubes each containing a purified sample of one of the following organic compounds is prepared. The chemical is then added to each tube. Which test tube will always turn bright red?

A) the tube containing nucleic acids
B) the tube containing proteins
C) the tube containing carbohydrates
D) the tube containing phospholipids

Correct Answer:

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