Answer: Beta-1,4 glycosidic bond.
- A Beta-1,4 glycosidic bond
- B Alpha-1,4 glycosidic bond
- C Alpha-1,6 glycosidic bond
- D Beta-1,6 glycosidic bond
Correct answer: A. Beta-1,4 glycosidic bond
Explanation: Cellulose is formed from beta-D-glucose units linked by beta-1,4 glycosidic bonds, creating rigid linear chains.
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.