Multiple choice Inactive pepsinogen is converted into pepsin in the presence of which of the following? HCl at pH 1.8 HCl at pH 7.5 Trypsin at pH 7.5 Chymotrypsin at pH 7.0 Elastase at pH 1.8 Reveal answer Fill a bubble to check yourself A Correct answer Explanation Pepsinogen is converted into pepsin at an acidic pH of 1.8 in gastric gland of the stomach.