Which molecule has higher keto -contents

Which DNA molecule has higher melting temperature?

Which one has higher diversity

Which molecule of a liquid has higher potential energy?

Molecule 'A' is twice as heavy as the molecule 'B .' Which of these has higher kinetic energy at any 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?