Answer: Change in base sequence.
- A Change in base sequence
- B Change in sugar
- C Loss of phosphate
- D Denaturation
Correct answer: A. Change in base sequence
Explanation: A mutation is a permanent change in the nucleotide sequence of DNA, which can alter the protein encoded.
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.