What type of macromolecule is glycogen?
Glycogen is a polysaccharide that serves as a storage form of glucose in animals.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Proteins and Polysaccharides - Structure and Functions
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In which kingdom do organisms generally store food reserves as glycogen or fat?
Members of Kingdom Animalia are multicellular, heterotrophic eukaryotes whose cells lack cell walls. They store food reserves as glycogen or fat and generally show holozoic nutrition.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Five Kingdom Classification and Kingdom Plantae Animalia
An organism stores reserve food as glycogen and oil droplets, obtains nutrients by absorption and generally possesses a
These features indicate Kingdom Fungi. Fungi are absorptive heterotrophs, generally have filamentous bodies and store reserve food as glycogen and oil droplets.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Five Kingdom Classification and Kingdom Plantae Animalia
Animals typically digest their food in an internal cavity and store reserve food energy primarily in the form of:
Unlike plants which store excess photosynthetic energy mostly as starch, the metabolic systems of animals are vastly different. According to the NCERT Biological Classification chapter, members of Kingdom Animalia directly store their reserve food energy primarily as 'glycogen or fat'. These highly efficient energy storage molecules can be rapidly mobilized during locomotion or starvation periods.
Ref: NCERT Class 11 Biology > Chapter 2: Biological Classification > 2.5 Kingdom Animalia
What is the primary function of glycogen in animals?
Energy storage accurately defines or describes the concept asked in this question. Within Carbohydrates, precise definitions and terminology are essential for clear scientific communication. The other options (Structural support, Enzyme activation, and Protein synthesis) either describe related but distinct concepts, use incorrect terminology, or confuse similar-sounding terms that have different scientific meanings. A thorough understanding of exact definitions helps distinguish between closely related biological concepts and is crucial for competitive examinations.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 7
The major structural difference between glycogen and amylopectin is:
Glycogen has more branching points accurately describes the key difference, similarity, or comparative feature asked about in this question. In Carbohydrates, the ability to compare and contrast related concepts is essential for deeper understanding. The distinguishing feature described by Glycogen has more branching points reflects fundamental differences in structure, function, mechanism, or origin between the compared entities. The other options (Amylopectin has α(1→6) linkages, Amylopectin lacks α(1→4) bonds, and Glycogen is found only in plants) either state incorrect comparisons, confuse the properties of the entities being compared, or describe features that are actually shared rather than different.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 7
The main function of glycogen in animals is:
Energy storage is the accurate answer because it correctly identifies the biological function or role described in this question. In Carbohydrates, understanding the specific functions of molecules, enzymes, or structures is fundamental. Energy storage fulfills this particular biological role through its specific structural properties, biochemical activity, or physiological mechanism. The other options (Structural support, Enzyme activation, and Cell signaling) serve different biological functions or are associated with other processes, pathways, or structural roles within the cell or organism.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 7