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#glycosidic bond

11 public questions tagged with this topic.

Genetics

The chemical nature of covalent linkage in a disaccharide is known as

metabolic engineering and inheritance analysis shows exogenous gene introduction and pathway extension enable trait improvement. Consequently Ether emerges as the valid choice since it demonstrates metabolic extension and combinatorial biosynthesis, aligning with established principles in genetics and biotechnology literature.

Ref: Griffiths et al., Introduction to Genetic Analysis, 11th Edition, Chapter 5, discusses metabolic pathways, recombinant DNA technology, metabolic extension and Golden Rice as pathway engineering for vitamin A production.

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Microbial Physiology

Which glycosidic bond is found in the pseudomurein of archaea?

Glycosidic bond specificity determines susceptibility to host defenses and bacteriophages. Bacterial peptidoglycan uses beta-1,4 linkages between N-acetylglucosamine and N-acetylmuramic acid, a substrate efficiently cleaved by hen egg white lysozyme and human lysozyme in tears and mucus, which hydrolyzes between C1 of MurNAc and C4 of GlcNAc. Archaeal pseudomurein in methanogens such as Methanobacterium and Methanobrevibacter employs beta-1,3 linkage between N-acetylglucosamine and N-acetyltalosaminuronic acid. This change in linkage position alters orientation of sugar residues and active sit

Ref: Sekh et al., Extremophiles 2020, Pseudomurein Linkages; Leahy et al., Front Microbiol 2020, Archaeal Wall.

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DNA

The glycosidic bond in nucleosides allows:

Free rotation of bases is the scientifically accurate answer to this question. Within the study of Nucleic Acid, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Free rotation of bases directly address what is being asked. Among the other options, Peptide bond formation, Fixed conformation of bases, and Hydrogen bonding do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent co

Ref: Campbell Biology, Urry et al., 12th Ed.

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DNA

In nucleotides, the base is attached to the sugar via a:

N-Glycosidic bond accurately identifies the binding site, binding partner, or molecular interaction described in this question. In Nucleic Acid, molecular recognition and binding specificity are governed by complementary shape, charge, and hydrophobic interactions between molecules. N-Glycosidic bond binds at the specified location due to its structural complementarity and specific non-covalent or covalent interactions. The other options (Phosphodiester bond, Hydrogen bond, and Ionic bond) describe binding to different sites, involve different types of molecular interactions, or represent inco

Ref: Campbell Biology, Urry et al., 12th Ed.

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Carbohydrates

Which disaccharide contains an α(1→1) glycosidic bond?

Aldaric acid accurately describes the structural composition or molecular organization asked about in this question. In Carbohydrates, knowledge of molecular structure is directly linked to understanding biological function. The specific arrangement of chemical components in Aldaric acid determines its physical properties, biological activity, and interactions with other molecules. The other options (Aldonic acid, Uronic acid, and Lactonic acid) describe different structural arrangements, incorrect stoichiometry, or compositions of different biological molecules.

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 7

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Carbohydrates

Which type of glycosidic bond is found in amylose?

α(1→4) 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. α(1→4) is specifically associated with the structure or compartment mentioned because of its unique biochemical properties and physiological role. The other options (α(1→6), β(1→4), and β(1→6)) are primarily associated with different cellular compartments, tissues, or structural contexts.

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 7

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Carbohydrates

Which of the following disaccharides contains an α(1→1) glycosidic bond?

Trehalose accurately describes the structural composition or molecular organization asked about in this question. In Carbohydrates, knowledge of molecular structure is directly linked to understanding biological function. The specific arrangement of chemical components in Trehalose determines its physical properties, biological activity, and interactions with other molecules. The other options (Sucrose, Lactose, and Maltose) describe different structural arrangements, incorrect stoichiometry, or compositions of different biological molecules.

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 7

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Carbohydrates

Which glycosidic bond is found in cellulose?

β(1→4) 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. β(1→4) is specifically associated with the structure or compartment mentioned because of its unique biochemical properties and physiological role. The other options (α(1→4), α(1→6), and β(1→6)) are primarily associated with different cellular compartments, tissues, or structural contexts.

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 7

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