Which of the following bonds is NOT involved | vedclass

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(A) The quaternary structure of proteins refers to the arrangement of multiple folded protein subunits in a multi-subunit complex. These subunits are

Vedclass · Accepted Answer

Covalent

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(A) The quaternary structure of proteins refers to the arrangement of multiple folded protein subunits in a multi-subunit complex. These subunits are held together by non-covalent interactions such as hydrogen bonds,ionic bonds,and hydrophobic interactions. While disulfide bonds (a type of covalent bond) are crucial for stabilizing the tertiary structure of individual polypeptide chains,they are generally not the primary forces holding distinct subunits together in a quaternary structure. Therefore,among the given options,covalent bonds (in the general sense of peptide bonds or disulfide bridges between subunits) are not the characteristic stabilizing force for quaternary assembly compared to the non-covalent interactions listed.

Column-$I$ (Type of Amino Acid)	Column-$II$ (Example)
$(A)$ Polar and uncharged $R$ group	$(i)$ Methionine
$(B)$ Non-polar $R$ group	$(ii)$ Glutamic acid
$(C)$ Polar and negatively charged $R$ group	$(iii)$ Lysine
$(D)$ Polar and positively charged $R$ group	$(iv)$ Cysteine

Which of the following bonds is $NOT$ involved in the quaternary structure of proteins?

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