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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Define the following as related to proteins: Peptide linkage - Chemistry

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प्रश्न

Define the following as related to proteins:

Peptide linkage

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उत्तर

Chemically, peptide linkage is an amide formed between the –COOH group and –NH2 group. The reaction between two molecules of similar or different amino acids proceeds through the combination of the amino group of one molecule with the carboxyl group of the other. This results in the elimination of a water molecule and the formation of a peptide bond –CO–NH–. The product of the reaction is called a dipeptide because it is made up of two amino acids.

For example, when the carboxyl group of glycine combines with the amino group of alanine, we get a dipeptide, glycylalanine.

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अध्याय 10: Biomolecules - Exercises [पृष्ठ ३०२]

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एनसीईआरटी Chemistry Part 1 and 2 [English] Class 12
अध्याय 10 Biomolecules
Exercises | Q 10.12 (i) | पृष्ठ ३०२

संबंधित प्रश्न

What is peptide linkage?


Discuss the optical activity of lactic acid.


Differentiate between the following :

Peptide linkage and Glycosidic linkage 


The correct statement for protein haemoglobin.


Which of the following statement is correct:


Protein found in a biological system with a unique three-dimensional structure and biological activity is called a native protein. When a protein in its native form, is subjected to a physical change like change in temperature or a chemical change like, change in pH, denaturation of protein takes place. Explain the cause.


Which moieties of nucleosides are involved in the formation of phosphodiester linkages present in dinucleotides? What does the word diester in the name of linkage indicate? Which acid is involved in the formation of this linkage?


The main structural feature of proteins is


Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be ______.


Explain formation of peptide linkage in protein with an example.


Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion (A): Proteins are found to have two different types of secondary structures viz alpha-helix and beta-pleated sheet structure.

Reason (R): The secondary structure of proteins is stabilized by hydrogen bonding.

Select the most appropriate answer from the options given below:


Out of the following, which type of interaction is responsible for the stabilisation of the α-helix structure of proteins?


The correct structure of Ruhemann's Purple, the compound formed in the reaction of ninhydrin with proteins is:


The total number of negative charge in the tetrapeptide, Gly-Glu-Asp-Tyr at pH 12.5 will be ______. (Integer answers)


An α-helix is a structural feature of ______.


Assertion (A): Proteins are polymers of α-amino acids connected by a peptide bond.

Reason (R): A tetrapeptide contains 4 amino acids linked by 4 peptide bonds.


β-pleated sheet structure in proteins refers to ______.


Write a classification of proteins with an example.


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