The amino acid attaches to the $t$ RNA at its
5'-end
3'-end
Anti codon site
DHU loop
To initiate translation, the $m$ RNA first binds to
the smaller ribosomal sub-unit
the larger ribosomal sub-unit
the whole ribosome
No such specificity exists
In E. coli, the lac operon gets switched on when
lactose is present and it binds to the repressor
repressor binds to operator
RNA polymerase binds to the operator
lactose is present and it binds to RNA polymerase
What is the function of histones in DNA packaging?
Functions of histones in DNA packaging are
(i) Histones as units of octamer participate in primary packaging of DNA.
(ii) Basic histone proteins neutralise the acidic DNA molecule.
Distinguish between heterochromatin and euchromatin. Which of the two is transcriptionally active?
Densely packed and dark stained chromatin regions are called hetorochromation, while, loosely packed light stained regions are called euchromatin.
Euchromation is transcriptionally active and is transcribed into mRNA. Due to very tight coiling heterochromatin can not be transcribed and is inert/inactive form.