Post-UTME Biology 2011 Objective — Question 2
Question 2 of 24 from the Post-UTME Screening (Post-UTME) Biology 2011 Objective paper, with the correct answer and a full explanation.
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A few drops of Fehling's solution were added to extract from fresh maize grain and a red precipitate was formed, indicating the presence of
- A. alcohol
- B. protein
- C. a reducing sugarCorrect
- D. starch
Explanation
A positive Fehling's test (red/brick precipitate) indicates the presence of a reducing sugar. Flagged: the scan's printed option read 'non-reducing sugar', which is likely a transcription/printing slip, since Fehling's test specifically detects reducing sugars. (No printed answer key for this session; answer worked out independently.)
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