Home
Flashcards
Preview
Lecture #46
Home
Get App
Take Quiz
Create
Automatically remove your image background. Try it now!
https://remove-image-background.com
endospore
made by bacillius and clostridia
they are alive but metobalically dormant
it is dry
highly resistant to chemicals and radiation
has the ability to germinate
structure of endospore
they have multiple layers around the DNA
core
cortex
core wall
exosporium
spore coat
what are the proesses tha form spores
sporulation ( during lack of nutrients)and germination
what gives endospores resistance ?
spore wall( stop chemical from getting into the inside of cells)
SASPs ( small acid soluable protein
Ca++/ Dipicolinic acids (DPA)
the two above bind to DNa and change it from B DNa to A (dry form)
this creates damage repair enzyme and the type of damage that is acculmuated
Bacillus types
anthracis
cereus
what is bacillus ?
gram positive bacteria
aerobic
Clostridia types
Botulinum
tetani
perfringens
difficile
what is Clostridia ?
anaerobic
gram positive
C.difficile
Treatment: fecal transplant ( get feces from others to restore your normal flora)
How to bacteria divide
Binary fission and vertical gene transfer
Horizontal Gene transfer
this is how bacteria have diversity in their genes and evolve
there are three main mechanism
conjugation
transformation
general transduction
conjugation
when bacteria exchange plasmids though a conjugation pilus (sex pilus)
transformation
allow bacteria to pick up naked dna that is outside of the cell
trasnduction
bacteria pick up gene from viruses
strict aerobes
use aerobic respiration
they make catylase and superoxydismutase to deal with oxygen free radicals
strict anaerobic resipiration
use anaerobic respiration
24ATP/1 molecule
facultative anerobes
can doboth aerobic and anaerobic respiration (fermentation)
they make superoxide dismutase and catalase
prefer to be aerobic
aerotolerant anerobes
also called fermenters
what kind of PH do bacteria/microbes like?
slightly basic 7.4
there are varying microbes that like different ph for example acidophile and alkalophiles.
which temperature prefering microbes attack humans?
mesophiles
grow from around 12 degrees celcius to about 45 degrees celcius
Automatically remove your image background. Try it now!
https://remove-image-background.com
Author
Iana
ID
353094
Card Set
Lecture #46
Description
Microbiology Bacteria II
Updated
2020-09-09T17:19:16Z
Show Answers
Home
Flashcards
Preview