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

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

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प्रश्न

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

टीपा लिहा
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उत्तर

(ii) disulphide linkage

(iv) hydrogen bonds

Explanation:

In fibrous proteins, polypeptide chains are held together by disulphide linkage and hydrogen bonds.

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पाठ 14: Biomolecules - Multiple Choice Questions (Type - I) [पृष्ठ २०९]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 14 Biomolecules
Multiple Choice Questions (Type - I) | Q 26 | पृष्ठ २०९

संबंधित प्रश्‍न

How are proteins classified on the basis of molecular shapes?


How is tripeptide formed?


Discuss the optical activity of lactic acid.


Define the following as related to proteins:

Peptide linkage


What are the common types of secondary structure of proteins?


What type of bonding helps in stabilising the α-helix structure of proteins?


Which of the following biomolecules is insoluble in water?


The protein responsible for blood clotting is ____________.


Which functional group participates in disulphide bond formation in proteins?


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 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?


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 ______.


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


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.


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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