Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
6 Cards in this Set
- Front
- Back
Archea (general)
|
-have plasmids
-no peptidoglycan cell wall -none do chlorophyll based photosynthesis -some fix nitrogen -none are pathogens |
|
2 groups of archea
|
Crenarcheota (mostly thermophilic and acidolphillic)
Euyarcheota (some methanogens) |
|
Acidophillic
|
-acid loving
-sulfolobus live in hot sulfur springs -some live at ph near 0 but maintin internal pH of 7 -lots of crenarcheota |
|
Methanogens
|
-produce methane by reducing CO2
-release 2 billion tons Ch4 per yr -many live in guts of mammals or ocean vents |
|
Halophiles
|
-salt lovers
-pink cartenoid pigments -some have light absorbing bacteriorhodopsin -live in most salty, alkaline environments on Earth -have increased osmolarity inside cell, specially adapted proteins, carbs, membrane pumps, desication resistannce |
|
THermophiles
|
-heat lovers
-hyperthermophyly 80C -adapations often independently evolved -need stable proteins with more salt bridges in proteins, altered amino acid content -slowed enzyme rates -decrease fluidity of membranes |