Thermococcus, Methanococcus and Methano-
bacterium exemplify
(a) bacteria whose DNA is relaxed or positively
supercoiled but which have a cytoskeleton as
well as mitochondria
(b) bacteria that contain a cytoskeleton and
ribosomes
(c) archaebacteria that contain protein homologous
to eukaryotic core histones
(d) archaebacteria that lack any histones resembling
those found in eukaryotes but whose DNA is
negatively supercoiled
bacterium exemplify
(a) bacteria whose DNA is relaxed or positively
supercoiled but which have a cytoskeleton as
well as mitochondria
(b) bacteria that contain a cytoskeleton and
ribosomes
(c) archaebacteria that contain protein homologous
to eukaryotic core histones
(d) archaebacteria that lack any histones resembling
those found in eukaryotes but whose DNA is
negatively supercoiled