Nucleus Flashcards
nucleus was first observed by
Robert Brown
the material of the nucleus stained by the basic dyes was given the name ______ by ______
chromatin
flemming
examples of anucleate organisms
mammalian rbcs, sieve tube cells at maturity
a nucleus in non-dividing phase is called
interphase nucleus
a typical interphase nucleus is differentiated into
nuclear envelope
nucleoplasm/nuclear matrix
nucleolus
chromatin
two membranes of nuclear membrane
outer and inner
inner nuclear membrane is smooth and out membrane is
smooth or has ribosomes like RER
the two membranes of nuclear envelope are separated by a space called
perinuclear space
width of perinuclear space
10 to 50 nm
how are nuclear pores formed
fusion of the two membranes
what do the nuclear pores do
control passage of substances
does nucleolus have a membrane
no
where is the site for synthesis of ribosomal RNA
nucleolus
chromatin fibres condense to form
chromosomes
chromatin is essentially composed of
dna
basic proteins called histones
rna
non-histone proteins
