Match the following genes of the Lac operon with their respective products.
$(a)\; i$ gene | $(i)\; \beta-$galactosidase |
$(b)\; z$ gene | $(ii)$ Permease |
$(c)\; a$ gene | $(iii)$ Repressor |
$(d)\; y$ gene | $(iv)$ Transacetylase |
Select the correct option.
$(a)\quad (b)\quad (c)\quad (d)$
$(i)\quad (iii)\quad (ii)\quad (iv)$
$(iii)\quad (i)\quad (ii)\quad (iv)$
$(iii)\quad (i)\quad (iv)\quad (ii)$
$(iii)\quad (iv)\quad (i) \quad (ii)$
The total number of nitrogenous bases in human genome is estimated to be about
Which one of the following pairs is correctly matched
Which amino acids are present in histones?
In recent past human chromosomes have been studied by a technique using specific, often fluorescent dyes, known as
Assertion : The uptake of $DNA$ during transformation is an active, energy requiring process.
Reason : Transformation occurs in only those bacteria, which possess the enzymatic machinery involved in the active uptake and recombination