Histone occupies the major grooves of $DNA$ at an angle of
$15^o$
$90^o$
$45^o$ to the helix axis
$30^o$ to the helix axis
In lac operon, the lac $mRNA$
Which one of the following peak absorption of ultraviolet light by heterocyclic bases $(Nitrogen bases)$
Balbiani discovered special type of chromosome from the salivary gland of Chironomus larva which are recognized by the presence of
Whereas the number of chromosomes is reduced to half in first reduction division of meiosis, then what is the need for second mitotic division
Sugars are attached to the pyrimidines by the formation of