Zusammenfassung der Ressource
biomembranes and
cell architecture
- Architecture
- Prokaryotes
- No organels, but do contain plasma membrane
- metabolites are thought to diffuse
freely
- primitive cytoskeleton in some bacterias
- Eucaryotes
- organels to develope its functions and
plasma membrane
- unique complement of proteins in
every organel
- nucleus and other organels in all cells
- Nucleus
- houses the genome of the cell
- Endosomes
- internalize plasma membrane
proteins and soluble materials
from the extracellular medium
- Lysosomes
- degrades worn.out or
unneeded cellular
components
- peroxisomes
- oxidize compunds that do not
involve ATP process
- mitochondrias
- multiple functions for the cell
including one of the most important
process (production of atp)
- chloroplasts (in plant cells)
- absorbs light for the atp
production of the plant
- Cytosol
- 3 mayor proteins
- actin filaments, microtubules,
and intermediate filament
- Cytoskeleton
- Structure and stability for the cell
- Biomembranes
- made of
- A phospholipid bilayer
- its principal compounds are
- -phosphoglycerides,
sphingolipids and
steroids
- lipids and many proteins are
laterrally mobile in
membranes
- Lipid rafts
- sites for signaling across
the membrane
- Proteins
- integral and peripheral
proteins
- integral proteins
- usually contain
- hydrophobic and hydrophilic
domain
- from the cytosolic and exoplasmic
faces of the membrane
- Porins
- Barell-like channel through
the membrane
- peripheral proteins
- interact with integral
proteins
- Are in the membrane
"temporarily"