The point at which the polytene chromosomes appear to be attached together is known as
Centriole
Chromocentre
Centromere
Chromomere
A normal spontaneous rate for a single gene is one mutation in every……replication
During infection of $\mathrm{E}$. coli cells by bacteriophage $T2$,
$DNA$ consists of two complementary nucleotide chains. If the sequence of nucleotide in one of the chains is $AGCTTCGA$, then the nucleotide sequence in the other chain shall be
Which of the following does not code for any proteins?