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GATE-Biotechnology-2018-->View question

Which one of the following is INCORRECT about protein structures? (GATE-Biotechnology-2018)

Which one of the following is INCORRECT about protein structures?
(A) A protein fold is stabilized by favorable non-covalent interactions
(B) All parts of a fold can be classified as helices, strands or turns
(C) Two non-covalent atoms cannot be closer than the sum of their van der Waals radii
(D) The peptide bond is nearly planar


Asked On2019-04-11 13:10:16 by:naikaumprakash

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the primary structure of a protein: I. Primary Structure: 1. It is a sequence of amino acids. 2. It is a linear polymer: linking the alpha-cacboxyl group of one amino acid to the alpha amino group of another amino acid => PEPTIDE BOND (covalent bond). 3. In some proteins, the linear polypeptide chain is cross-linked: Disulfide bonds.

The primary structure is a polypeptide, in which: 

  + each amino acid in the peptide is a residue. 

  + there is a regularly repeating segment called the main chain or backbone,and a variable part, comprised of the side chain.


Therefore, the answer is (B) All parts of a fold can be classified as helices, strands or turns


Answerd on:2019-05-19 Answerd By:ShwetaMerchant

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the primary structure of a protein: I. Primary Structure: 1. It is a sequence of amino acids. 2. It is a linear polymer: linking the alpha-carboxyl group of one amino acid to the alpha amino group of another amino acid => PEPTIDE BOND (covalent bond). 3. In some proteins, the linear polypeptide chain is cross-linked: Disulfide bonds.

The primary structure is a polypeptide, in which: 

  + each amino acid in the peptide is a residue. 

  + there is a regularly repeating segment called the main chain or backbone, and a variable part, comprised of the side chain.


Therefore, the answer is (B) All parts of a fold can be classified as helices, strands or turns


Answerd on:2019-05-19 Answerd By:ShwetaMerchant

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the primary structure of a protein: I. Primary Structure: 1. It is a sequence of amino acids. 2. It is a linear polymer: linking the alpha-carboxyl group of one amino acid to the alpha amino group of another amino acid => PEPTIDE BOND (covalent bond). 3. In some proteins, the linear polypeptide chain is cross-linked: Disulfide bonds.

The primary structure is a polypeptide, in which: 

  + each amino acid in the peptide is a residue. 

  + there is a regularly repeating segment called the main chain or backbone, and a variable part, comprised of the side chain.


Therefore, the answer is (B) All parts of a fold can be classified as helices, strands or turns


Answerd on:2019-05-19 Answerd By:ShwetaMerchant

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the primary structure of a protein: I. Primary Structure: 1. It is a sequence of amino acids. 2. It is a linear polymer: linking the alpha-carboxyl group of one amino acid to the alpha amino group of another amino acid => PEPTIDE BOND (covalent bond). 3. In some proteins, the linear polypeptide chain is cross-linked: Disulfide bonds.

The primary structure is a polypeptide, in which: 

  + each amino acid in the peptide is a residue. 

  + there is a regularly repeating segment called the main chain or backbone, and a variable part, comprised of the side chain.


Therefore, the answer is (B) All parts of a fold can be classified as helices, strands or turns


Answerd on:2019-05-19 Answerd By:ShwetaMerchant

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