The Question is from neet-botany biomolecules-biology , and it was created by the author D VINOD

Question

The bond linking the sugar and base in a nucleoside is:

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Nucleotide structure
 **Related Topics**: Nucleic acids (DNA and RNA), glycosidic bonds
 **Prerequisites**: Basic understanding of organic chemistry, molecular structures
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the type of bond connecting the sugar and base components within a nucleoside.
  A nucleoside is a fundamental unit of nucleic acids, composed of a nitrogenous base linked to a sugar molecule (ribose or deoxyribose).
**Method & Steps**:
 1. Identify the components of a nucleoside:  A nucleoside consists of a pentose sugar (ribose or deoxyribose) and a nitrogenous base (purine or pyrimidine).
  Reasoning: Nucleosides are precursors to nucleotides, which are the building blocks of DNA and RNA.
  Formula/Rule: None specifically, relies on knowledge of molecular structure.
 2. Determine the type of bond: The bond that connects the nitrogenous base to the sugar is a glycosidic bond, specifically an N-glycosidic bond because it involves the nitrogen atom of the base.
  Working: The anomeric carbon atom (C1') of the sugar forms a bond with a nitrogen atom of the base (N1 for pyrimidines, N9 for purines).
  Key Point:  The difference between a nucleoside and a nucleotide is that a nucleotide also includes a phosphate group linked to the sugar.
 3. Identify the correct option: Option D, N-glycosidic bond, correctly identifies the bond type.
  Result: N-glycosidic bond
  Verification: The N-glycosidic bond is the established and accepted linkage between the sugar and base in a nucleoside.
 ## OPTION ANALYSIS
[A] :x: Phosphodiester bond: This bond links the sugar molecules in the backbone of nucleic acids (DNA and RNA), not the sugar and base within a nucleoside.
[B] :x: Hydrogen bond: Hydrogen bonds are responsible for base pairing between complementary strands in DNA and RNA, not for linking the sugar and base within a nucleoside.
[C] :x: Peptide bond: Peptide bonds link amino acids in proteins, not components of nucleosides.
[D] ✓: N-glycosidic bond: This is the correct bond type linking the sugar and base in a nucleoside.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing N-glycosidic bonds with phosphodiester bonds: Remember that phosphodiester bonds link the sugar-phosphate backbone, while N-glycosidic bonds link the sugar to the base.
  2.Overlooking the 'N' in N-glycosidic bond:  The 'N' specifies that the bond is formed with a nitrogen atom of the base.
 **Quick Tips**:
  1.Visualize the structure of a nucleoside to remember the bond type.
  2.Associate 'glyco' with 'sugar' to remember that the bond involves a sugar molecule.

D VINOD · Answer

Phosphodiester bond

D VINOD · Answer

Hydrogen bond

D VINOD · Answer

Peptide bond

D VINOD · Answer

The correct Option is "N-glycosidic bond"

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