Biology Digestion/Nutrition SZABMU 2022
PMDC Verified Question 26 of 48
The first chemical digestion of proteins takes place in the:
A
Mouth
B
Esophagus
C
Stomach
D
Intestine
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Stomach
Concept:

Different macronutrients begin their chemical breakdown in different compartments of the digestive tract.

Formula:

N/A

Solution:

  • Carbohydrate digestion begins in the mouth (salivary amylase).
  • Protein digestion requires an acidic environment to denature the complex 3D structures and specific proteases (like pepsin) to cleave peptide bonds.
  • Therefore, the very first chemical digestion of proteins occurs upon arrival in the Stomach.


Why other options are incorrect:

The mouth and esophagus have no protein-digesting enzymes. The intestine continues and completes protein digestion, but does not initiate it.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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