2.4-5 eukaryotic cell structure Flashcards
what happens at the nucleolus
ribosomes are produced
what’s the structure of the nucleus like
it’s surrounded by a double membrane called the nuclear envelope and it contains nuclear pores and chromatin
what’s the structure of the rough endoplasmic reticulum like and what does it do
a series of membrane bound flattened sacs covered in ribosomes which fold and process the proteins made by the ribosomes on the surface
what’s the smooth endoplasmic reticulum like and what does it do
a series of membrane bound sacs and it produces and processes lipids
what’s the golgi apparatus like and what does it do
it’s a series of fluid filled flattened sacs what modifies and packages proteins it also produces lysosomes
what’s the structure of the mitochondria like and and what does it do
they are oval shaped and bound by a double membrane the inner is highly folded to form cristae and the interior is called the matrix it contains the enzymes needed for respiration
what are centrioles like and what do they do
they are hollow cylinders containing microtubules and right angles and they are involved in cell division
what is the structure of ribosomes like and what do they do
they are composed of two subunits made up of proteins and rRNA and they produce proteins
what are lysosomes like and what do they do
they are vesicles containing digestive enzymes bound by a single membrane
what are the three components of cytoskeleton and what does it do
microtubules, microfilaments and intermediate fibres they aid transport within the cells and enable cell movement and provide mechanical strength
secretory pathway
ribosomes are made by the nucleolus and leave the nucleus through nucleus pores and travels to the cytoplasm
the proteins produce on the surface of the RER fold and package them and they travel in vesicles to the golgi
at the golgi they are modified and packaged into vesicles they then travel to where they are needed in the cell or the plasma membrane for exocytosis
