Biology Biomolecules MDCAT 2019
PMDC Verified Question 109 of 142
Starch is present in tuber, fruits and grains but absent in animal cells. Instead, animals have a substance stored in liver and muscles known as:
A
Galactose
B
Glucagon
C
Glucose
D
Glycogen
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Glycogen
Concept:

Both plants and animals require a macromolecular storage form of glucose to prevent osmotic lysis.

Solution:

  • Plants store excess glucose as starch.


  • Animals store excess glucose as a highly branched polysaccharide known as glycogen.


  • Glycogen is often colloquially referred to as 'animal starch' and is stored abundantly in the liver and skeletal muscles.


Why other options are incorrect:

  • Glucose/Galactose: Simple monomers, not bulk storage molecules.


  • Glucagon: A hormone secreted by the pancreas that triggers the breakdown of glycogen; it is a protein, not a carbohydrate.

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