3.4 Flashcards
characteristics of archea
Domain: Archea
cell type: Prokaryotic
number of cells: unicellular
Nutrion: heterotrphs and autotrophs
cell wall: not made of peptidoglycan
-occaionsally no cell wall
method of reproduction: Asexual - binary fusion
structure of prokaryotes
3.4 archea and bacteria (cell wall,dna..plasmicz0
- cell wall provides structural support and protection
- DNA forms a ring not a strand
- single chromosome
-some bacteria have flagella - used for movement
- plasmid, small loop of dna
- contains different genes then ones found in the chromosomes
Cell shapes
1.) Cocci - Sphrical shaped
2.) Bacilli - Rod shaped
3.) Sprilla - Spiral shaped
cell shape prefixes (1,2)
mono- lives in single cells
diplo- live in pairs
Gram staining
Technique that helps classify and identify prokaryotypes
gram postive
Absorbs purple stain, thick peptidogylan layer
gram negative
stains pink, has a think layer of peptidoglycan
nutrition of both Archea and bacteria
they both have 2 think of the two kinds of nutrition organsims can have
they can be both autotrophic and or heterotrophic
photosynthesis:
process that converts CO2 into water and sugar
-produces oxygen as a by-product
Methanogensis
-unique to archea
-produces mathane as a by-product
-methane is a greenhouse gas found in the digestive tract of cattle
what is binary fusion?
A cell divides into 2 genetically identical cells
how does binary fusion proceed?
We start with the parent cell which as the features of the cell wall, chromosome, cytoplasm and the cytoplasmic membrane which then replicates, and then segregates slowly which splits the cell into two individual identical daughter ells
extremophiles: the three types
Thermophiles are heat lovers
Acidophiiles are acid lovers
Halophiles are salt lovers
what is a bacteria that can cause food poisoning?
Clostridium botulinum
what is a gram positive bacteria that causes strep throat?
streptococcus pyogenes
