A. reducing sugar
B. fatty acid
C. sucrose
D. amino acid
Correct Answer:
Option A – reducing sugar
Explanation
During a water bath, which is usually 4–10 minutes, the solution of the mixture and Benedict’s solution should progress in the colors of blue (with no reducing sugar present), orange, yellow, green, red, and then brick red precipitate or brown (with high reducing sugar present). A color change would signify the presence of a reducing sugar.
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