Which one of the following peak absorption of ultraviolet light by heterocyclic bases $(Nitrogen bases)$
$150\ nm$
$26\ nm$
$75\ nm$
$260\ nm$
Who used the word "chromosome''
Repressor of lac-operon
The pairing of bivalent synapsis occur in
Which one of the following correctly represents the manner of replication of $DNA$
$DNA$ elements, which can switch their position, are called