Match List-I with List-II and select the correct answer using the codes given below: List-I (Substance) List-II (Physiological role)A. Ptyalin1. Converts angiotensinogen in blood into angiotensinB. Pepsin2. Digests starchC. Renin3. Digests proteinsD. Oxytocin4. Hydrolyses fats5. Induces contraction of smooth muscles
✓ Correct answer: a) A – 2; B – 3; C – 1; D – 5
ExplanationEnzymes are biological catalysts, crucial for various biological processes, including digestion, metabolism, and DNA replication.Hormones are chemical messengers produced by endocrine glands which regulate various physiological processes, such as growth, development, metabolism, reproduction, and mood.A is matched with 2: Ptyalin, also known as salivary amylase, is an enzyme present in saliva that breaks down starch into maltose and smaller polysaccharides during digestion.B is matched with 3: Pepsin is a proteolytic enzyme secreted in the stomach.It helps digest proteins into smaller peptides by breaking peptide bonds in acidic conditions.C is matched with 1: Renin is an enzyme secreted by the kidneys in response to low blood pressure.It converts angiotensinogen (produced by the liver) into angiotensin I, which is further converted to angiotensin II, a potent vasoconstrictor.D is matched with 5: Oxytocin is a hormone produced by the hypothalamus and secreted by the pituitary gland.It induces the contraction of smooth muscles, particularly in the uterus during childbirth and
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