Cell Flashcards
Not a membrane bound organell in eykaryotes
Ribosomes , nicleolus
Site or active ribosomal RNA synthesis
Nucleolus
Ribosomes are made up of
rRNA + Proteins
Core of cilium or the flagellum
Axoneme
The axondmd usually has how many doublets of radially arranged peripheral microtubles
Nine pair of doublets
Cilia , flagella axonemal is referred as how many array
9+2
Who observed a large number of plants and said they are composed of different kind of cells
Matthias Schleiden , german botanist , 1838
What did Theodare schwann do
Found plasma member , also saw presence of cell wall in plant cell
Ribosomes are found
Chloroplast , mitocondria , ER
All prokaryotes have
Cell wall except mycoplasma
Many bacteria has smaller circular dna outside the genomic DNA known as
Plasmids
Plasmid dna has unique phenotypic characters such as
Resistance to antibodies
Plasmid DNA is used for
Monitor bactetial transformation with foreign DNA
Essential foldings of cell membrance in prokaryotes
Mesosomes
Cell wall of bacteria consists of
Glycocalyx , cell wall , plasma membrane
bacteria can be classified into two groups on the basis of
cell envelopes and staining procedure
Types of glycocalyx
(loose sheath ) slime layer , (thick and tough ) capsule
mesosomes are in the form of
vesicles , tubules and lamellae
function of mesosome
Cell wall formation , DNA replication , repiration , secretion process , to increase the surface area of the plasma membrane and enzyymatic content
bacteria flagellum is composed of three parts
filament , hook , basal body
Pilli
elongated tubular structure made of special proteins ( not does not play a role in motility)
Fimbriae
small bristle like fibers sprouting out of the cell , they help to attach the bacteria to rocks and to host tissues
