Coliphage $T_2$ has

Identify the correct matching for Euchromatin and Heterochromatin from the given statements:
$I -$ Loosely packed
$II -$ Densely packed
$III -$ Darkly stained region
$IV -$ Lightly stained region
$V -$ Transcriptionally active chromatin
$VI -$ Transcriptionally inactive chromatin
Euchromatin $\quad\quad$ Heterochromatin

If the base sequence of one strand of $DNA$ is known,the sequence of bases in the other strand is determined based on:

The telomeres of eukaryotic chromosomes consist of short sequences of

The length of one full turn of $B-DNA$ is ....... (in $nm$)

In a given species,which of the following ratios is constant?