Which one of the following statements about starch and glycogen is correct?

Starch and glycogen are both storage polysaccharides composed of glucose units, but they are found in different types of organisms. Starch is the primary energy storage carbohydrate in plants [1]. It is produced in the leaves through photosynthesis and stored in structures like amyloplasts, seeds, and tubers to serve as an internal energy reserve [3]. In contrast, glycogen is the major storage form of glucose in animals and is often referred to as 'animal starch' [2]. It is highly concentrated in the liver and skeletal muscles to maintain glucose homeostasis [2]. Crucially, glycogen does not exist in plant tissue, and starch is not the storage molecule for animal cells [2]. Therefore, starch is characteristic of plant cells while glycogen is characteristic of animal cells.

Sources

1. [1] Science-Class VII . NCERT(Revised ed 2025) > Chapter 10: Life Processes in Plants > 10.2.1 Leaves: the ̒ food factories̓of plants > p. 140
2. [3] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > 5.2.1 Autotrophic Nutrition > p. 81
3. [2] https://www.ncbi.nlm.nih.gov/books/NBK539802/