DNA molecule has uniforms dimeter due to ?

DNA molecule is formed of :

In a DNA molecule

In a DNA molecule

Which DNA molecule has lower melting temperature?

Which DNA molecule has higher melting temperature?

A DNA molecule has higher melting point having more number of GC pairs than another DNA molecule which has more number of AT pairs. What conclusion can be drawn from this fact?

The end of fragments of DNA molecule are sticky due to :

" Which of the following DNA molecule has high "T_(m)" (temp of melting) "