Question

Read some characteristics of an enzyme isolated from living tissue of animals
(i) Extracellular enzyme
(ii) Shows optimum activity at ${37}^{o}C$
(iii) Is most effective at $pH7.8$
(iv) Catalyses hydrolysis of peptide bonds
The source and substrate of this enzyme can be

• A. Saliva and starch
• B. Pancreas and proteins
• C. Stomach and proteins
• D. Small intestine and starch

Answer 1

Answer: (B)

Pancreas and proteins

• Those enzymes that are secreted in the cell but their functioning occurs outside the cell, these enzymes are termed as extracellular enzymes.
• Mostly enzymes of salivary glands and pancreas are more active at 37${}^0$C and show optimum activity at pH 7.8, but pancreatic enzymes are found to be more related to this condition.
• Pancreatic enzyme trypsin helps in the hydrolysis of the peptide bonds. It breaks the peptide bonds into proteins and helps in the digestion of proteins.

So, the correct option is 'Pancreas and proteins'.
37o