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Peptide Bond, Fibrous & Globular Protein Video Lecture | Biology Class 11 - NEET

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FAQs on Peptide Bond, Fibrous & Globular Protein Video Lecture - Biology Class 11 - NEET

1. What is a peptide bond?
Ans. A peptide bond is a type of chemical bond that forms between the carboxyl group of one amino acid and the amino group of another amino acid. It is formed through a dehydration synthesis reaction, where the carboxyl group loses a hydroxyl group and the amino group loses a hydrogen atom. Peptide bonds are responsible for linking amino acids together in proteins.
2. What are fibrous proteins?
Ans. Fibrous proteins are a type of protein that have a long, elongated shape and are usually insoluble in water. They are made up of repeating units of amino acids and are characterized by their strength and structural role in the body. Examples of fibrous proteins include collagen, which provides strength to connective tissues, and keratin, which forms the structure of hair and nails.
3. What are globular proteins?
Ans. Globular proteins are a type of protein that have a compact, rounded shape and are usually soluble in water. They are made up of various types of amino acids and are characterized by their diverse functions in the body. Globular proteins are involved in functions such as enzymatic reactions, transportation of molecules, immune response, and regulation of cellular processes.
4. How are peptide bonds formed?
Ans. Peptide bonds are formed through a chemical reaction called dehydration synthesis. In this reaction, the carboxyl group (-COOH) of one amino acid reacts with the amino group (-NH2) of another amino acid. During the reaction, a water molecule is released, and the carboxyl group of one amino acid forms a covalent bond with the amino group of the other amino acid, resulting in the formation of a peptide bond.
5. What is the role of peptide bonds in protein structure?
Ans. Peptide bonds play a crucial role in determining the primary structure of proteins. The sequence of amino acids linked by peptide bonds determines the unique three-dimensional structure and function of a protein. Additionally, peptide bonds contribute to the stability and rigidity of the protein structure by forming a planar structure and allowing for rotation around the bond. Without peptide bonds, proteins would not be able to fold into their specific shapes and carry out their functions in the body.
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