Prokaryotes Flashcards
Characteristics of Prokaryotes
What are Prokaryotes?
organisms that lack a membrane bound nucleus
Prokaryotes mean
before a nucleus
Prokayotes include
bacteria and archea
Prokaryotic cell is surrounded by
plasma membrane and a cell wall
Function of cell wall
prevents a prokaryote from bursting or collapsing due to fluctuations in the amount of fluid inside the cell.
Capsule
additional cover of glycocalyx
Glycocalyx
a layer of polysachhrides
S layer
in parasitic form of bacteria, Slayer help protect the cell from host defenses
Flagella
means of movement
Fimbriae
short, bristle like fibres used to adhere to surfaces
Nucleoid
dense area where a single chromosome consisting of circular strand of DNA is found.
Plasmids
accessory rings of DNA called plasmid, which contain genes for antibiotic resistance, production of toxins and degradation of chemicals
Prokaryotic ribosomes
carry out protein synthesis and are smaller than eukaryotic ribosomes.
Binary fission
asexual means of reproduction in prokaryotes, one cell divides into two cells