Answer: Deoxyribonucleic acid.
- A Deoxyribonucleic acid
- B Diribonucleic acid
- C Dinucleic acid
- D Dinitrogenous acid
Correct answer: A. Deoxyribonucleic acid
Explanation: DNA is deoxyribonucleic acid, the carrier of genetic information.
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.