Answer: C-1 (the aldehyde carbon in the open chain).
- A C-1 (the aldehyde carbon in the open chain)
- B C-2, the carbon bearing the secondary hydroxyl group
- C C-3, the central carbon of the pyranose ring
- D C-6, the primary alcohol carbon outside the ring
Correct answer: A. C-1 (the aldehyde carbon in the open chain)
Explanation: The anomeric carbon (C-1 in aldoses) is the one that forms the new chiral centre when the ring closes.
Two amino acids join via a condensation reaction: the carboxyl -OH of one and an amine -H of the other are eliminated as water, leaving a peptide bond (-CO-NH-) linking them into a dipeptide; repeating this builds a full protein chain.
Concept context
The chemistry of life: carbohydrates, proteins, lipids, nucleic acids, enzymes, and vitamins. Understand their structures, classification, and biological functions. Highly relevant for NEET and Class 12 board exams.