What is meant by (i) peptide linkage (ii) biocatalysts?

1.	What is meant by (i) peptide linkage (ii) biocatalysts?
Answer» (i) Peptide linkage is an amide (—CONH₂) linkage formed between —COOH group of one α -amino acid and —NH₂ group of other a-amino acid by the loss of a water molecule in a peptide. (ii) A number of reactions that occur in the bodies of animals and plants to maintain the life process are catalysed by enzymes. The enzymes are thus termed as biocatalysts. Almost all the enzymes are globular proteins. An enzyme catalyses a biochemical reaction by providing alternate lower activation path thereby increasing the rate of the biochemical reaction. For example, activation energy for acid hydrolysis of sucrose is 6.22 kJ mol^–1 while the activation energy is only 2.15 kJ mol^–1when hydrolyzed in the presence of enzyme sucrose.

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What is meant by (i) peptide linkage (ii) biocatalysts?

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