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प्रश्न
Explain formation of peptide linkage in protein with an example.
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उत्तर
Proteins are polymers of α-amino acid, and a huge number of α-amino acid peptide bonds connect them (amide bond).
A peptide bond is a chemical link produced between two molecules when one of their carboxyl groups combines with the amino group of the other releasing a water molecule (H2O). This is a dehydration synthesis reaction (also known as a condensation reaction) that happens most commonly between amino acids.
For example:
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संबंधित प्रश्न
How are proteins classified on the basis of molecular shapes?
What is peptide linkage?
How is tripeptide formed?
Define the following as related to proteins:
Peptide linkage
What type of bonding helps in stabilising the α-helix structure of proteins?
Write one difference between α-helix and β-pleated structures of proteins.
Which of the following biomolecules is insoluble in water?
The protein responsible for blood clotting is ____________.
The helical structure of protein is stabilized by:
Which of the following statement is correct:
Proteins are found to have two different types of secondary structures viz. α-helix and β-pleated sheet structure. α-helix structure of protein is stabilised by:
Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present?
Optical rotations of some compounds along with their structures are given below which of them have D configuration.
| (I) |  |
| (II) |  |
| (III) |  |
Proteins can be classified into two types on the basis of their molecular shape i.e., fibrous proteins and globular proteins. Examples of globular proteins are:
(i) Insulin
(ii) Keratin
(iii) Albumin
(iv) Myosin
Which of the following are purine bases?
(i) Guanine
(ii) Adenine
(iii) Thymine
(iv) Uracil
The main structural feature of proteins is
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:
Presence of disulphide link gives rise to which structure of protein?
Out of the following, which type of interaction is responsible for the stabilisation of the α-helix structure of proteins?
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 ______.
Write a classification of proteins with an example.
Statement I: A protein is imagined as a line, the left end represented by first amino acid (C-terminal) and the right end represented by last amino acid (Nterminal).
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:
