Name the basic structural unit of chromatin, which is described by R.Kornberg?
A.
Scaffold protein
B.
Solenoid
C.
30nm fiber
D.
Nucleosome
Answer: Option D
Explanation:
Nucleosome is the first level of DNA packing structure which is composed of beads-on-a-string structure. R.Kornberg in 1974 described the basic structure of chromatin.