cell biology Flashcards
define the KARYOLUMPH
it is a transport semi solid granular that fills the space between the nuclear envelope and the nucleolus
the nucleoprotein of the nucleoplasm arw categorised as what
histones
what is the thickness of the nuclear membrane
75-90A
the outer membrane of the nucleus remain rough due to the presence of which oorganell
Endoplasmic reticulum
what covers the pore complex of the nucleus
it is covered by a thin membrane called Septum
where does translation occur in eukaryotic cells
cytoplasm
list the set of organelles that are common to both prokaryotic and eukaryotic cells
1.cell membrane
2.ribosomes
3.DNA
4.cytoplasm
which organelle are importabt during cell division
Centrioles
define the Nucleolus
it is a ball-like mass of fibres and granules within the nucleus of eukaryotic cells
how many membranes delineate the (borders) of prokaryotic cells
One membrane
which organism produces phycoerythrin
Algae
what connects the stacks of thylakoids sacs
Stroma lamellae
what common chemical structure does pigments in plants have
porphyrin ring
where does ribosomes originate
nucleus
what does a Codon visually represent during protein synthesis
Amino acid
give an example of a spontaneous generation
1.butterfly from caterpillar
2.maggote from rotten meat
3. fleas from dust
which scientist stated that all cells arise from pre_existing cells
RUDOLF VIRCHOW
what is the main function of the smooth ER
the detoxification of drugs and poisons in the blood
which scientist first described cell division
WALTER FLEMING
give three fact about the endosymbiosis theory
1.mitochondria makesit own proteins
2.mitochondria replicates
3.mitochondria has it own DNA
which organell synthesize ribosomes
nucleoli
which organelle is involve in translation
nucleous
what is the ratio of DNA to proteins of a chromatin fibre
1:1
what is the diameter of the nuclear pore
