In tertiary structure of $DNA$, what is a histone octamer?
A complex consisting of eight positively charged histone proteins (two of each $H2A, H2B, H3 and H4$) that aid in the packaging of $DNA.$
The core of nucleosome is made up of
Which of the following is the simplest amino acid
Select the two correct statements out of the four $(i -iv)$ statements given below about lac operon.
$(i)$ Glucose or galactose may bind with the repressor and inactivate it.
$(ii)$ In the absence of lactose the repressor binds with the operator region.
$(iii)$ The zgene codes for permease.
$(iv)$ This was elucidated by Francois Jacob and Jacques Monod.
The correct statements are
One gene one enzyme concept means
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