9 public questions tagged with this topic.
Glucose, with five -OH groups in its open chain form, reacts with acetic anhydride to form a pentaacetate, confirming its structure.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Carbohydrates - Monosaccharides - Structure and Properties
Glucose is a reducing sugar because it has a free aldehyde group in its open chain form that can reduce oxidizing agents like Tollens’ or Fehling’s reagents.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Carbohydrates - Monosaccharides - Structure and Properties
Fructose is a ketohexose, a six-carbon sugar with a ketone group at C2.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Carbohydrates - Monosaccharides - Structure and Properties
Deoxyribose, found in DNA, is a pentose lacking an -OH group at C2, unlike ribose.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Carbohydrates - Monosaccharides - Structure and Properties
Deoxyribose is the five-carbon sugar in DNA nucleotides, lacking an -OH group at C2.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
Ribose, a five-carbon sugar, is the monosaccharide component of RNA nucleotides.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
Ketose is the accurate classification or categorization for the organism, molecule, or concept described in this question. In Carbohydrates, proper classification is based on shared characteristics including morphological, biochemical, genetic, and evolutionary criteria. Ketose meets the specific diagnostic features and defining criteria that distinguish it from related groups. The other options (Aldose, Disaccharide, and Polysaccharide) belong to different taxonomic groups, represent different classification levels, or possess distinct characteristics that exclude them from this category.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 7
Cyclization 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 Cyclization directly address what is being asked. Among the other options, Epimerization, Mutarotation, and Glycosidic bond formation 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
Maltose is the correct choice because it does not accurately describe or belong to the category addressed in this question. In the context of Carbohydrates, the other options (Fructose, Glucose, and Galactose) are all valid and well-established concepts. Maltose is either unrelated to the topic, describes a different biological process, or represents a common misconception. Questions framed as 'which is NOT' require students to identify the exception among otherwise correct statements, demanding comprehensive knowledge of the topic rather than recognition of a single fact.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 7
