Practice questions focused on the structural components of nucleic acids, including nucleotides, sugar-phosphate backbones, and base pairing in DNA and RNA.
The sugar and phosphate groups form the backbone of nucleic acids via phosphodiester bonds.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
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
In DNA, adenine pairs with thymine via two hydrogen bonds, following base-pairing rules.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
Adenine pairs with thymine in DNA via two hydrogen bonds, contributing to the double helix stability.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
DNA contains deoxyribose, which lacks an -OH group at C2, unlike ribose in RNA.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
A glycosidic bond connects the sugar (ribose or deoxyribose) to the nitrogenous base in a nucleotide.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
Deoxyribose is the sugar in DNA nucleotides, differing from ribose by lacking an -OH group at C2.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
DNA contains deoxyribose, a pentose sugar lacking an -OH group at the 2’ position, distinguishing it from ribose in RNA.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
Purine bases in nucleic acids include adenine and guanine; guanine is present in both DNA and RNA.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
Hydrogen bonds hold complementary base pairs (A-T, G-C) together in the DNA double helix.
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
Adenine and thymine form two hydrogen bonds in DNA, contributing to base pairing stability.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
