cell structure and function Flashcards
three components of prokaryotic cells?
- lack of internal membrane prganelles
- within cytosplasm thers is nucloid containing circular DNA
- contain ribosomes and cell wall
three components of animal cells?
membrane bound organelles, nucleus and mitcohondria etc, compartmentalisation
three components of plant cells?
cell wall, more structure than animal cell, compartmentalisation
what is the microtubule organising centre madeup of?
centrosome composed of centrioles
three components of a nucleus?
house genetic material, coordinates cell growth and division, double membrane
what is nucelar envelope?
has nucelar pores to allow entry and exit of materials
what compenent within nucleus produces ribosomes?
nucleolus
where can ribosomes be found?
free in cytosol and attatched to endoplasmic reticulum
two types of endoplasmic reticulum?
smooth and rough
two components of smooth ER
runs down middle, involved in lipid synthesis
two components of rough ER?
at the sides, involved in proteins, translocate new polypeptide chain in lumen
what is the golgi complex?
series of enclosed flattened membrane sacs = cisternae
when proteins arrive at er where do they gp?
cis face
where are proteins sorted in er?
trans-golgi network
three components of microtubules?
made of tubulin, largest element, HOLLOw tubes, likr rail tracks
