Biology Digestion/Nutrition SZABMU 2024
PMDC Verified Question 6 of 48
Gall stones are caused by the precipitation of:
A
Calcium phosphate
B
Calcium
C
Cholesterol
D
Proteins
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Cholesterol
Concept:

Bile contains high concentrations of lipids. If the delicate ratio of bile components shifts, these lipids can fall out of solution and crystallize.

Formula:

N/A

Solution:

  • The liver continuously excretes cholesterol into bile.
  • Bile salts usually act as solvents to keep this cholesterol dissolved.
  • If there is a hypersecretion of cholesterol or a deficit in bile salts, the excess cholesterol precipitates out, forming hard crystalline masses known as gallstones (cholelithiasis).


Why other options are incorrect:

While some gallstones contain bilirubin or trace calcium, the vast majority (over 80%) are fundamentally composed of precipitated cholesterol. Calcium phosphate stones typically form in the kidneys, not the gallbladder.

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.

Previous Question All Digestion/Nutrition MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App