Melamine polymer is formed by the condensation of:

During the denaturation of proteins, which of these structures will remain intact?

Drugs used to bind to receptors, inhibiting is natural function and blocking a message are called:

Given below are two statements :

Statement I : On heating with $$\mathrm{KHSO}_{4}$$, glycerol is dehydrated and acrolein is formed.

Statement II : Acrolein has fruity odour and can be used to test glycerol's presence.

Choose the correct option.