Describe the digestive role of chymotrypsin. Which two other digestive enzymes of the same category are secreted by its source gland?

Pro-enzyme pepsinogen is a protein digesting enzyme (inactive form) of the human digestive system. Name the digestive gland which secretes this enzyme,

The substance which can accept electrons is a Lewis acid. 'BCl_3, BF_3' and 'BBr_3' are Lewis acids. a. Arrange the above Lewis acids in the increasing,order of their acid strength. b. Give reason for this order of acidic strength, c. The chemistry of boron is different from that of other members of the same group. Mention any two differences and give reason.

Pro-enzyme pepsinogen is a protein digesting enzyme (inactive form) of the human digestive system. How does pepsinogen change into its active form, pepsin?