1.

(a) What type of bonding helps in stabilising `alpha`-helix structure of proteins ? (b) What is the structural difference between nucleoside and mucleotide ?

Answer» (a) The presence of hydrogen bonding between `gt C = O` group and H atom of `H-underset(H)underset(|)(N)-` group in adjecent positions stabilises the `alpha`-helix structure of proteins.
(b) A combination of base and sugar is known as nucleoside while a combination of base, sugar and phosphates results in nucleoside.


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