Name spherical bacteria: (4)
Cocci
1- streptococcus pneumnia
2- neissara meningitus
3- diplococus phneumoniae
4-staphylococus aureus
Name rod bacteria: (3)
Bacili
1-Bacillus subtillus
2- Escherichia coli
3-pseudomonas!!
Name spiral bacteria: (2)
spirochete
1- helicobacter pylori
2- treponema pallidum (Syphilus!)
Which has no peptidoglycan
Mycoplasma
(pleomorphic & sterols in membrane)
bacilus
Comma shaped
Vibrio, is a bacilus
Pili role & structure
Conjugation process
transferring DNA
Plasmids
smaller than flagella
NOT mobility
Pili are present in ________
Alternative name of pili
gram negative ONLY
fimbriae
_______ has more lipids, and how many more
gram negative has 11-12%
Whereas positive has 1-4%
Dry weight of peptidoglycan in gram positive
No. of major layers in gram positive
50%
1
Dry weight of peptidoglycan in gram negative
No. of major layers in gram negative
10%
2
gram positive color
purple
gram negative color
pink
Which holds the CV (crystal violet) complex
gram positive
(gram negative doesnt as its thin cell wall washes it off)
Thickness of gram +ive vs -ive
+ive: 20-80nm
-ive: 8-11nm
____ is where genetic material is stored in bacteria. It is stained by _____
1- nucleoid / nuclear body / chromatin body / nuclear region
2- Fuelgen stain
Aerobic bacteria
Anearobic bacteria
psuedomonas
spirochete
faculative bacteria
E coli
grow regardless of oxygen
Microaerophilic
camplylobacter
Require less oxygen concentration
Microbicidal vs microbistatic
bicidal = killing microbes instantly
bistatic = inhibits reproductive capacity
Attenuated cultures of bacteria are used in
vaccination
spirochete vs spirillum
chete: thin flexible
illum: thick rigid
Invariable features of bacteria
cell membrane, chromatin, cyptomplasm, ribosomes &0s
What is pleorphism? and examples (2)
ability to alter shape
eg:
1- helibacter pylori (helix or spherical)
2-haemophilus influenzae
Heat:
Moist heat vs dry heat affect
Moist: coagulation of protiens
Dry: oxidation of chemical constituents
