Answer: Two glucose units linked by alpha 1,4-glycosidic bond.
- A Two glucose units linked by alpha 1,4-glycosidic bond
- B Glucose and fructose joined by an alpha,beta 1,2-glycosidic bond
- C Glucose and galactose joined by a beta 1,4-glycosidic bond
- D Two fructose units joined by a beta 2,1-glycosidic bond
Correct answer: A. Two glucose units linked by alpha 1,4-glycosidic bond
Explanation: Maltose is formed from two glucose units joined by an alpha-1,4 glycosidic bond.
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.