Each chromosome at the anaphase stage of a bone marrow cell in our body has
Two chromatids
No chromatids
Only one chromatid
Several chromatids
The genes, which are confined to differential region of $Y$ chromosome only, are called
The core of nucleosome is made up of
What are informosomes
Which one of the following hydrolyses internal phosphodiester, bonds in a polynucletide chain
Which one of the following correctly represents the manner of replication of $DNA$