Nucleotides are linked by
hydrogen bonds.
phosphodiester bonds.
peptic bonds.
ionic bonds.
Which of the following is not found in $DNA$
In a given $DNA$ segment the number of nucleotides of guanine is $75$ and those of thymine is $75$. The total number of nucleotides in the segment will be
Which one of the following histone is not present in the core particle of nucleosome
Which of the following nitrogenous bases are common for both $RNA$ and $DNA$?
Distinguish between heterochromatin and euchromatin. Which of the two is transcription-ally active ?