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प्रश्न
An α-helix is a structural feature of ______.
पर्याय
Sucrose
Polypeptides
Nucleotides
Starch
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उत्तर
An α-helix is a structural feature of polypeptides.
Explanation:
An α-helix is a structural feature of polypeptides. In this structure, –NH– group of amino in one turn is twisted and stablised by hydrogen bond with the >C–O groups of amino acids. It is the secondary structure of protein.
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संबंधित प्रश्न
How are proteins classified on the basis of molecular shapes?
What is peptide linkage?
Differentiate between the following :
Peptide linkage and Glycosidic linkage
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:
In fibrous proteins, polypeptide chains are held together by:
(i) van der Waals forces
(ii) disulphide linkage
(iii) electrostatic forces of attraction
(iv) hydrogen bonds
Which of the following are purine bases?
(i) Guanine
(ii) Adenine
(iii) Thymine
(iv) Uracil
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:
The correct structure of Ruhemann's Purple, the compound formed in the reaction of ninhydrin with proteins is:
β-pleated sheet structure in proteins refers to ______.
What is the effect of denaturation on the structure of proteins?
