<span>A substance that cannot be broken down to simpler substances is called a element. There are 118 different elements. A element is made from only one atom. </span><span />
Answer:-
(iv) (i) + (II)
Explanation:-
Hydrogen bonds Occur between Hydrogen and an element with high electronegativity like N or O.
DNA base pairs are arranged such that they are complimentary. Hence hydrogen bonding will occur between both the amide carbonyl and NH2 as well as the amide NH and Nitrogen of the cyclic C=N-C group.
True because molo means two so you would need more than 1 atom