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प्रश्न
What is peptide linkage?
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उत्तर
A peptide linkage (a peptide bond) is the amide linkage (–CONH–), which is formed between the two amino acid molecules.
The general formula of a peptide bond can be written as follows:
\[\begin{array}{cc}
\ce{R - CH - CO - NH - CH - R}\\
|\phantom{............................}|\phantom{...}\\
\phantom{.}\ce{NH2}\phantom{......................}\ce{NH2}\\
\end{array}\]
Where [–CO – NH–] is the peptide linkage.
संबंधित प्रश्न
How is tripeptide formed?
Discuss the optical activity of lactic acid.
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Fibrous proteins and Globular proteins
Write one difference between α-helix and β-pleated structures of proteins.
Differentiate between the following :
Peptide linkage and Glycosidic linkage
Optical rotations of some compounds along with their structures are given below which of them have D configuration.
| (I) |  |
| (II) |  |
| (III) |  |
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(i) Insulin
(ii) Keratin
(iii) Albumin
(iv) Myosin
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(i) Guanine
(ii) Adenine
(iii) Thymine
(iv) Uracil
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Explain the terms primary and secondary structure of proteins. What is the difference between α-helix and β-pleated sheet structure of proteins?
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 ______.
Peptide linkage 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 ______.
Proteins are polymers 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.
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Write a classification of proteins with an example.
Match List I with List II:
| List I | List II |
| A. GLUT-4 | I. Hormone |
| B. Insulin | II. Enzyme |
| C. Trypsin | III. Intercellular ground substance |
| D. Collagen | IV. Enables glucose transport into cells |
Choose the correct answer from the options given below:
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Statement II: Adult human haemoglobin, consists of 4 subunits (two subunits of a type and two subunits β type.)
In the light of the above statements, choose the correct answer from the options given below:
