Benedict's test results interpretation: A positive result is associated with color change to green to brick red depending on concentration

Benedict's test results interpretation: A positive result is associated with color change to green to brick red depending on concentration

• A. It remains blue regardless of sugar
• B. It turns green to brick red depending on concentration
• C. It detects lipids
• D. It detects nucleic acids

Answer: (B)

Benedict's test detects reducing sugars by changing the color of the reagent as the sugar concentration increases. The reagent starts blue, and when reducing sugars are present, they reduce Cu2+ to Cu+, producing a precipitate that ranges in color from green to yellow to orange to brick red as the amount of sugar rises. A positive result is therefore described as turning green to brick red depending on concentration. If no reducing sugar is present, the solution stays blue. This test is specific to reducing sugars, so lipids or nucleic acids are not detected by it.

Benedict's test detects reducing sugars by changing the color of the reagent as the sugar concentration increases. The reagent starts blue, and when reducing sugars are present, they reduce Cu2+ to Cu+, producing a precipitate that ranges in color from green to yellow to orange to brick red as the amount of sugar rises. A positive result is therefore described as turning green to brick red depending on concentration. If no reducing sugar is present, the solution stays blue. This test is specific to reducing sugars, so lipids or nucleic acids are not detected by it.