Practice questions focused on the structure and classification of proteins, including the effects of denaturation on their function and properties.
Proteins are denatured by heavy metal ions, which disrupt disulfide bonds and other interactions in their structure.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
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
The secondary structure (e.g., alpha-helix, beta-sheet) of proteins is stabilized by hydrogen bonds between the backbone atoms.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Hemoglobin, a globular protein, binds oxygen in red blood cells for transport throughout the body.
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
Myosin, a fibrous protein, interacts with actin to enable muscle contraction in muscle fibers.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Hemoglobin, a globular protein, transports oxygen in the blood by binding it to its heme groups.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Fibrous proteins have elongated structures and are insoluble in water. Collagen, found in connective tissues, is an example.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Keratin, a fibrous protein, provides strength and protection to skin, hair, and nails.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Collagen, a fibrous protein, provides strength and structure to connective tissues like tendons and ligaments.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Urea disrupts hydrogen bonds in proteins, destabilizing secondary and tertiary structures.
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
