Both starch and glycogen are made up of glucose, however:

[amp_mcq option1=”starch is present in liver and glycogen is present in red blood cells.” option2=”glycogen is made in animal cells, but starch is made in plant cells.” option3=”both starch and glycogen are present in animal and plant cells.” option4=”both starch and glycogen are present in plant cells only.” correct=”option2″]

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UPSC CAPF – 2023

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Starch and glycogen are both polysaccharides composed of glucose units, serving as energy storage molecules. Starch is the primary storage carbohydrate in plants, found in plastids like chloroplasts and amyloplasts. Glycogen is the primary storage carbohydrate in animals and fungi, mainly stored in the liver and muscles in animals. Therefore, glycogen is made and stored in animal cells, while starch is made and stored in plant cells.

– Both starch and glycogen are glucose polymers used for energy storage.
– Starch is found in plants.
– Glycogen is found in animals and fungi.

Starch exists in two forms: amylose (linear chain) and amylopectin (branched chain). Glycogen is highly branched, more so than amylopectin. The different structures affect their physical properties and rate of breakdown. Neither starch nor glycogen are typically found in both animal and plant cells in significant quantities; their roles are specific to different domains of life. Red blood cells in animals do not store glycogen as they lack the necessary organelles.

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