126 public questions tagged with this topic.
The quaternary structure involves interactions (e.g., hydrogen bonds, disulfide bonds) between multiple polypeptide chains in a protein.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
The tertiary structure, stabilized by weak interactions (e.g., hydrogen bonds, hydrophobic interactions), is disrupted by heat during denaturation.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Denaturation disrupts the secondary and tertiary structures of proteins due to the breaking of hydrogen bonds and other interactions, while the primary structure remains intact.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Globular proteins are spherical and water-soluble. Insulin is an example, unlike fibrous proteins like keratin.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Enzymes, which are proteins, lose activity when their tertiary structure is disrupted (denatured), as the active site is altered.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Hydrogen bonds between the -NH and -C=O groups of the peptide backbone stabilize the alpha-helix structure.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Glutamic acid has two carboxyl groups: one in the main chain (-COOH) and one in the side chain (-CH₂-CH₂-COOH).
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Amino Acids - Essential, Non-Essential and Structure
Cysteine forms disulfide bridges (-S-S-) via oxidation of its sulfhydryl groups, stabilizing protein structure.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Amino Acids - Essential, Non-Essential and Structure
Phenylalanine has a side chain with a benzene ring (-CH₂-C₆H₅), making it aromatic.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Amino Acids - Essential, Non-Essential and Structure
Glycine has the simplest structure with a hydrogen atom as its side chain (-H).
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Amino Acids - Essential, Non-Essential and Structure
The primary structure of a protein is the sequence of amino acids linked by peptide bonds between carboxyl and amino groups.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Amino Acids - Essential, Non-Essential and Structure
The primary structure of a protein is the linear sequence of amino acids linked by peptide bonds.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Amino Acids - Essential, Non-Essential and Structure
