Bacterial Structure - Revision history

Bara: Redirected page to Bacterial Cell Structure

2010-08-16T13:13:54Z

Redirected page to Bacterial Cell Structure

Eca02csb at 10:26, 20 July 2010

2010-07-20T10:26:39Z

Eca02csb at 10:22, 20 July 2010

2010-07-20T10:22:02Z

Eca02csb at 10:12, 20 July 2010

2010-07-20T10:12:51Z

Bara at 11:05, 25 June 2010

2010-06-25T11:05:12Z

Bara at 11:23, 17 May 2010

2010-05-17T11:23:58Z

Bara at 11:22, 17 May 2010

2010-05-17T11:22:30Z

Bara: Created page with ''''Bacterial genome''': Contains double-stranded DNA Prokaryotic DNA differs to eukaryotic DNA: Few repeated sequences Most of the DNA is transcribed **No intervening sequ…'

2010-05-17T11:20:34Z

Created page with ''''Bacterial genome''': *Contains double-stranded DNA *Prokaryotic DNA differs to eukaryotic DNA: **Few repeated sequences **Most of the DNA is transcribed **No intervening sequ…'

New page

'''Bacterial genome''':
*Contains double-stranded DNA
*Prokaryotic DNA differs to eukaryotic DNA:
**Few repeated sequences
**Most of the DNA is transcribed
**No intervening sequences within structural genes
'''Cytoplasm''':
*Does not contain mitochondria, lysosomes or Golgi bodies (found in eukaryotic cells)
*Contains mesosomes- thought to be primitive endoplasmic reticulum
'''Surface components''':[[Image:478px-Bacteria cell wall svg- franciscosp2.png|thumb|right|100px|Structure of cell wall- copyright Franciscop2 2008]]
*Fimbriae- also known as pili, these are hair-like structures that allow bacteria to adhere to each other
*F-type pili- also known as sex pili, these act as conjugation tubes during sexual reproduction
*Capsules/slime- serve to adhere bacteria to cells and provide protection from phagocytosis and dehydration, e.g. hyaluronic acid
*Flagella- help the bacteria move around

One way bacteria can be classified is by the structure of the cell wall:
*'''Gram-positive bacteria''': cell wall consists of peptidoglycan layer, with teichoic polymers attached, e.g. ''Staphylococcus''
*'''Gram-negative bacteria''':peptidoglycan layer is thinner, but surrounded by outer membrane of lipopolysaccharides and lipoproteins, e.g. salmonella

[[Image:427px-Arrangement of bacilli bacteria svg.png|thumb|right|100px|Arrangement of bacilli bacteria]]
[[Image:497px-Arrangement of cocci bacteria svg.png|thumb|right|100px|Arrangement of cocci bacteria]]
{| border="1"
|+ Components of bacterial envelope
! Component !! Gram positive !! Gram negative
|-
! Peptidoglycan
| Yes || Yes
|-
! Teichoic acid
|Yes
|No
|-
! Lipoprotein
|No
|Yes
|-
! Lipopolysaccharide
|No
|Yes
|-
! Phospholipid
|No
|Yes
|}

Another method of classification is the shape and arrangement of the bacteria themselves:

*'''Cocci'''- round shape, e.g. Streptococci, Staphylococci, Neisseria
*'''Rods''' or '''bacilli'''- long shape, e.g. Coliforms, Bacillus, Spirochaetes[[Category:Bacteria]]

← Older revision		Revision as of 13:13, 16 August 2010
Line 1:		Line 1:
−	~~'''Bacterial genome''':~~	+	#REDIRECT [[Bacterial Cell Structure]]
−	*Contains double-stranded DNA
−	*Prokaryotic DNA differs to eukaryotic DNA:
−	**Few repeated sequences
−	**Most of the DNA is transcribed
−	**No intervening sequences within structural genes
−	~~'''Cytoplasm''':~~
−	*Does not contain mitochondria, lysosomes or Golgi bodies (found in eukaryotic cells)
−	*Contains mesosomes- thought to be primitive endoplasmic reticulum
−	~~'''Surface components''':~~[[~~Image:478px-Bacteria cell wall svg- franciscosp2.png\|thumb\|right\|100px\|'''~~Structure ~~of cell wall''' Franciscop2 2008, WikiMedia Commons]]~~
−	*Fimbriae- also known as pili, these are hair-like structures that allow bacteria to adhere to each other
−	*F-type pili- also known as sex pili, these act as conjugation tubes during sexual reproduction
−	*Capsules/slime- serve to adhere bacteria to cells and provide protection from phagocytosis and dehydration, e.g. hyaluronic acid
−	*Flagella- help the bacteria move around
−
−	~~One way bacteria can be classified is by the structure of the cell wall:~~
−	*'''[[:Category:Gram positive bacteria\|Gram-positive bacteria]]''': cell wall consists of peptidoglycan layer, with teichoic polymers attached, e.g. ''Staphylococcus''
−	*'''[[:Category:Gram negative bacteria\|Gram-negative bacteria]]''':peptidoglycan layer is thinner, but surrounded by outer membrane of lipopolysaccharides and lipoproteins, e.g. salmonella
−
−	~~[[Image:427px-Arrangement of bacilli bacteria svg.png\|thumb\|right\|100px\|'''Arrangement of bacilli bacteria''' LadyofHats 2006, WikiMedia Commons]]~~
−	~~[[Image:497px-Arrangement of cocci bacteria svg.png\|thumb\|right\|100px\|'''Arrangement of cocci bacteria''' LadyofHats 2006, WikiMedia Commons]]~~
−	~~{\| border="1"~~
−	~~\|+ Components of bacterial envelope~~
−	~~! Component !! Gram positive !! Gram negative~~
−	\|-
−	~~! Peptidoglycan~~
−	~~\| Yes \|\| Yes~~
−	\|-
−	~~! Teichoic acid~~
−	~~\|Yes~~
−	~~\|No~~
−	\|-
−	~~! Lipoprotein~~
−	~~\|No~~
−	~~\|Yes~~
−	\|-
−	~~! Lipopolysaccharide~~
−	~~\|No~~
−	~~\|Yes~~
−	\|-
−	~~! Phospholipid~~
−	~~\|No~~
−	~~\|Yes~~
−	\|}
−
−
−	~~Another method of classification is the shape and arrangement of the bacteria themselves:~~
−
−	*'''[[:Category:Cocci\|Cocci]]'''- round shape, e.g. Streptococci, Staphylococci, Neisseria
−	*'''[[:Category:Rods\|Rods]]''' or '''bacilli'''- long shape, e.g. Coliforms, Bacillus, Spirochaetes[[Category:Bacteria]]
−	~~[[Category:To_Do_-_Bacteria~~]]

← Older revision		Revision as of 11:05, 25 June 2010
Line 49:		Line 49:
	*'''[[:Category:Cocci\|Cocci]]'''- round shape, e.g. Streptococci, Staphylococci, Neisseria		*'''[[:Category:Cocci\|Cocci]]'''- round shape, e.g. Streptococci, Staphylococci, Neisseria
	*'''[[:Category:Rods\|Rods]]''' or '''bacilli'''- long shape, e.g. Coliforms, Bacillus, Spirochaetes[[Category:Bacteria]]		*'''[[:Category:Rods\|Rods]]''' or '''bacilli'''- long shape, e.g. Coliforms, Bacillus, Spirochaetes[[Category:Bacteria]]
		+	[[Category:To_Do_-_Bacteria]]

@@ Line 15: / Line 15: @@
 One way bacteria can be classified is by the structure of the cell wall:
-*'''[[:Category:Gram-positive bacteria|Gram-positive bacteria]]''': cell wall consists of peptidoglycan layer, with teichoic polymers attached, e.g. ''Staphylococcus''
+*'''[[:Category:Gram positive bacteria|Gram-positive bacteria]]''': cell wall consists of peptidoglycan layer, with teichoic polymers attached, e.g. ''Staphylococcus''
-*'''[[Category:Gram-negative bacteria|Gram-negative bacteria]]''':peptidoglycan layer is thinner, but surrounded by outer membrane of lipopolysaccharides and lipoproteins, e.g. salmonella
+*'''[[:Category:Gram negative bacteria|Gram-negative bacteria]]''':peptidoglycan layer is thinner, but surrounded by outer membrane of lipopolysaccharides and lipoproteins, e.g. salmonella
 [[Image:427px-Arrangement of bacilli bacteria svg.png|thumb|right|100px|Arrangement of bacilli bacteria]]
@@ Line 47: / Line 47: @@
 Another method of classification is the shape and arrangement of the bacteria themselves:
-*'''[[:Caegory:Cocci|Cocci]]'''- round shape, e.g. Streptococci, Staphylococci, Neisseria
+*'''[[:Category:Cocci|Cocci]]'''- round shape, e.g. Streptococci, Staphylococci, Neisseria
-*'''[[Category:Rods|Rods]]''' or '''bacilli'''- long shape, e.g. Coliforms, Bacillus, Spirochaetes[[Category:Bacteria]]
+*'''[[:Category:Rods|Rods]]''' or '''bacilli'''- long shape, e.g. Coliforms, Bacillus, Spirochaetes[[Category:Bacteria]]

@@ Line 19: / Line 19: @@
 [[Image:427px-Arrangement of bacilli bacteria svg.png|thumb|right|100px|'''Arrangement of bacilli bacteria''' LadyofHats 2006, WikiMedia Commons]]
-[[Image:497px-Arrangement of cocci bacteria svg.png|thumb|right|100px|Arrangement of cocci bacteria]]
+[[Image:497px-Arrangement of cocci bacteria svg.png|thumb|right|100px|'''Arrangement of cocci bacteria''' LadyofHats 2006, WikiMedia Commons]]
 {| border="1"
 |+ Components of bacterial envelope

@@ Line 8: / Line 8: @@
 *Does not contain mitochondria, lysosomes or Golgi bodies (found in eukaryotic cells)
 *Contains mesosomes- thought to be primitive endoplasmic reticulum
-'''Surface components''':[[Image:478px-Bacteria cell wall svg- franciscosp2.png|thumb|right|100px|Structure of cell wall- copyright Franciscop2 2008]]
+'''Surface components''':[[Image:478px-Bacteria cell wall svg- franciscosp2.png|thumb|right|100px|'''Structure of cell wall''' Franciscop2 2008, WikiMedia Commons]]
 *Fimbriae- also known as pili, these are hair-like structures that allow bacteria to adhere to each other
 *F-type pili- also known as sex pili, these act as conjugation tubes during sexual reproduction