Which one of the following is a base analogue
Nitrous acid
Colchicine
$5$ -bromouracil
Caffeine
Which of the following enzyme can form $RNA$ from $DNA$
One geneone enzyme hypothesis was postulated by
Out of the two strands of $DNA$ one is carrying genetic information for transcription and it is called
"Nu body'' was shown by
In tryptophan operon