a) 1869

b) 1909

c) 1953

d) 1952

a) Walter Flemming on root tip cells of Vicia faba

b) J. Herbert Taylor, Philip Wood and Walter Hughes on root tip cells of Vicia faba

c) Walter Flemming on root tip cells of Phaseolus vulgaris

d) J. Herbert Taylor, Philip Wood and Walter Hughes on root tip cells of Phaseolus vulgaris

a) CENP – A

b) H2A

c) H3

d) H4

a) Associated with loops of 40 – 90 kb

b) Topoisomerase I

c) SMC protein

d) Proteinacious in nature

a) True

b) False

a) Linker histone molecule

b) Linker DNA

c) Nucleosome structure

d) 10 nm fibre

a) Helical model

b) 8 nucleosomes per turn

c) Structure supported by X – ray diffraction

d) Helical pitch of approximately 13 nm

a) H1 induce 10 nm fibre formation

b) H1 binding gives nucleosome a defined a

c) H1 stabilizes higher order chromatin structures

d) H1 binds to two DNA helices at once