Choose the incorrect statement about glucose:
Correct answer: D. Glucose has five secondary alcohol groups
- A. Glucose has one −CHO group
- B. Glucose has five −OH groups and one primary alcohol group
- C. Glucose gives a positive Fehling's solution test
- D. Glucose has five secondary alcohol groups
Explanation
The open-chain structure of glucose contains one aldehyde group, four secondary alcohol groups (on carbons 2, 3, 4, and 5), and one primary alcohol group (on carbon 6). The statement that it has five secondary alcohol groups is incorrect.
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Proteins are classified by shape, composition and structure, from primary amino acid sequence to secondary, tertiary and quaternary organisation, and their biological roles are linked to this structure. Enzymes are examined as protein biocatalysts, including active sites, substrate specificity, activation energy, cofactors and factors affecting activity.
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