Which one of the following hydrolyses internal phosphodiester, bonds in a polynucletide chain
Lipase
Exonuclease
Endonuclease
Protease
In protein synthesis, which of the following are required for the synthesis of charged $tRNA$?
How many chromosomes are present in an unfertilized egg
$DNA$ is methylated at
If an isolated strain of $DNA$ is kept at $82-90^o C$, then
If in a test tube, $mRNA$ of E. coli cells and $tRNAs$ from the body of rats are taken and sufficient number of amino acids are put, then the polypeptide synthesized will be of the nature of