1.

Which of the following is correct about H-bonding in nucleotide?

Answer»

A---A and T ---T
G---T and A---C
A --- G and T ---C
A---T and G --- C

Solution :
The hydrogen bonds are formed between the BASE (SHOWN by dotted lines). Because of size and geometries of the bases, the only possible pairing in DNA and between G(Guanine) and C(Cytosine) through THREE H-bonds and between A (Adenine) and T (Thymine) through two H-bonds.


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