Which polysaccharide is found in bacterial cell walls?
Peptidoglycan is a structural component of bacterial cell walls.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Proteins and Polysaccharides - Structure and Functions
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Which polysaccharide is present in the exoskeleton of arthropods?
Chitin is a polysaccharide found in the exoskeleton of arthropods.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Proteins and Polysaccharides - Structure and Functions
The reducing end of a polysaccharide refers to:
The end containing a free anomeric carbon 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 (The terminal glucose unit in a polymer, The site where hydrolysis occurs, and The part of the molecule resistant to digestion) 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 main reason for the insolubility of cellulose in water is:
Strong hydrogen bonding between chains is the scientifically accurate answer to this question. Within the study of Carbohydrates, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Strong hydrogen bonding between chains directly address what is being asked. Among the other options, Its linear structure, Its α(1→4) glycosidic linkage, and Presence of hydrophobic groups do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 7
Which polysaccharide is the main component of bacterial cell walls?
Peptidoglycan is the correct answer as it accurately identifies the biological location, composition, or distribution described in this question. In Carbohydrates, the spatial organization and localization of molecules are critical to their function. Peptidoglycan is specifically associated with the structure or compartment mentioned because of its unique biochemical properties and physiological role. The other options (Chitin, Glycogen, and Dextran) are primarily associated with different cellular compartments, tissues, or structural contexts.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 7