During which phase of cell cycle, DNA and histones are completely disorganized from each other?
a) S-phase
b) G1-phase
c) G2- phase
d) mitotic phase
Explanation: bit after DNA replication, both DNA and histones begin to organize to become chromosome
The organization of chromosomes occurs in ……..levels.
a) two
b) three
c) four
d) five
In 1st level of chromosome organization, how many nucleotides of duplex DNA wrap twice around the core of eight histone?
a) 100
b) 200
c) 1000
d) 2000
Explanation: two of each H2A, H2B, H3 and H4 histone proteins with DNA forming a complex known as nucleosome. H1 is associated with small segment of DNA called linker DNA between every two nucleosome
What is the thickness of whole DNA molecule?
a) 2 mm
b) 2cm
c) 2nm
d) 2 µm
What is the thickness of nucleosome (the complex of DNA and eight Histones?
a) 20 mm
b) 3cm
c) 10nm
d) 10µm
DNA wrap twice around the core of eight
histones proteins to form nucleosome except……
a) H2A
b) H2B
c) H3
d) H1
