Thiamine is a kind of

If ......... are loosely associated with the .........,they are called co-enzymes.

Which of the following is related to vitamin $B_2$?

Substances which enhance reactions after combining with enzymes are called

Provide the full names of the following biological molecules:
$(1)$ $FAD$
$(2)$ $NAD$

$A$ dialysable,non-protein organic substance which combines with an apoenzyme to make a functional enzyme is called: