Question

Enzyme present in the saliva of human being ?

• A. Pepsin
• B. Trypsin
• C. Tylin
• D. Lipase

Hint:

The main digestive enzyme in human saliva is {salivary amylase}. An older, but sometimes still used, name for salivary amylase is {Ptyalin} (or {Tylin} as written in the option). This enzyme starts the digestion of {starch} in the mouth.

Answer 1

The Correct Option is C

Concept: Saliva is a digestive fluid secreted by salivary glands in the mouth. It contains enzymes that begin the process of digestion. Step 1: Composition and Function of Saliva Saliva has several functions, including:
Moistening food to aid in chewing and swallowing.
Starting the chemical digestion of carbohydrates.
Containing antimicrobial agents. The primary digestive enzyme in human saliva is salivary amylase. An older name for salivary amylase is ptyalin (often seen as "tylin" in some older texts or simpler questions). Step 2: Action of Salivary Amylase (Ptyalin/Tylin) Salivary amylase begins the breakdown of starch (a complex carbohydrate) into smaller sugar molecules, such as maltose and dextrins. Step 3: Analyzing the options
(1) Pepsin: A digestive enzyme found in the stomach that breaks down proteins into peptides. It functions in an acidic environment.
(2) Trypsin: A digestive enzyme produced by the pancreas and active in the small intestine. It also breaks down proteins.
(3) Tylin (Ptyalin / Salivary Amylase): This is the enzyme present in saliva that digests carbohydrates (starch).
(4) Lipase: A group of enzymes that break down fats (lipids). Saliva contains a very small amount of lingual lipase, which begins fat digestion, but salivary amylase (ptyalin/tylin) is the major and most well-known digestive enzyme in saliva specifically for carbohydrates. Given the options, "Tylin" refers to salivary amylase. Therefore, Tylin (Ptyalin), which is salivary amylase, is the enzyme present in human saliva that initiates carbohydrate digestion.