The human body needs a constant supply of proteins to survive. The first part of the digestive system to begin digesting proteins is

Correct option is B

Ans (b)
Sol. Explanation:
· Stomach is the first part of the digestive system where protein digestion begins. The stomach secretes pepsin, an enzyme that starts breaking down proteins into smaller peptides.
· The mouth is involved in mechanical digestion (chewing) and the breakdown of carbohydrates (via amylase in saliva), but not proteins.
· The small intestine is where the majority of protein digestion and absorption occurs, but digestion starts in the stomach.
· The large intestine primarily absorbs water and electrolytes and is not involved in protein digestion.