Answer: Activation energy is minimum and protein structure is intact.
- A Activation energy is minimum and protein structure is intact
- B All available substrate molecules are consumed simultaneously
- C Competitive inhibitors are completely absent from the mixture
- D The surrounding pH is held exactly neutral at that temperature
Correct answer: A. Activation energy is minimum and protein structure is intact
Explanation: At the optimum temperature, enough thermal energy exists for reactions but the enzyme is not yet denatured.
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.