作者：Farah Amalina 9 年以前
474
PROKARYOTIC & EUCARYOTIC CELLS
Gram negative vs gram positive cell wall
Prokaryotes vs eukaryotes
PROKARYOTIC & EUCARYOTIC CELLS
Components of prokaryotic cell
structures internal to the cell wall
Inclusions
Magnetosomes
Gas vacuoles
Carboxysomes
Sulfur granules
Lipid inclusions
Polysaccharide granules
Metachromatic granules
Ribosomes
Nuclear Area
Cytoplasm
Plasma (cytoplasmic) membrane
Active processes
Passive processes
Osmosis
Hypertonic
Hypotonic
Isotonic
Facilitated diffusion
Simple diffusion
Gram negative cell wall
Gram positive cell wall
structures external to the cell wall
Fimbriae and pili
Axial filaments
Flagella
Lophotrichous
Amphitrichous
Peritrichous
Monotrichous
Glycocalyx
What is life?
Cellular structure
Metabolism
Responsiveness
Reproduction
Growth
Prokaryotic
no membrane receptors
binary fission
no membrane bound organelles
circular DNA
complex cell wall
small ribosomes
simple appendages
no cytoskeleton
unbound nucleoid
Bacterial and archaeal structures
endospore
survival under harsh condition
flagella
swimming motality
fimbriae and pili
attachment to surface
capsules and slime layers
resistance to phagocytosis
cell wall
provides shape and protection
periplasmic space
G(+) small or absent
G(-) contain hydrolytic enzymes
nucleiod
localisation of genetic material
inclusions
storage of carbons, phosphates and others
ribosomes
protein synthesis
gas vacuole
buoyancy for floating
plasma membrane
selectively permeable barrier
Eukaryotic
big ribosomes
cytoskeleton
cell wall simple when present
mitosis
membrane receptors
membrane bound organelles
linear DNA with histones
complex appendages
membrane bound nucleus and nucleolus
