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MBY 251 Lecture 1 Study Set Exam
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MBY 251 Lecture 1 Study Set Exam ...
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MBY 251 Lecture 1 StudySet Exam
Epulopiscium fisheloni - Answer 600 um long
Large for prokaryote
multiple copies of its genome
unique cell division>multiple offspring
related to clostridium
gut of tropical marine fish
Thiomargarita - Answer 750 micro m in diameter
Nanobacteria - Answer 50-500nm
lower limits of cell size - Answer <0.15um unlikely
open oceans-small cells>0.2-0.4um
cell size does not influence rate of mutation (evolution)
*volume for essential components
*<0.1=insufficient
*0.15=marginal
mutations - Answer = raw material of evolution
>the larger tho pool of mutations, the greater the evolutionary possibilities
>prokaryote=haploid>mutations expressed
immediately
=adapt rapidly>easily exploit new env.
Pathogenic bact. - Answer very small
genomes=highly streamlined
missing genes
, functions supplied by host
Cytoplasmic membrane - Answer =barrier separating cytoplasm from external env.
=selective permeability
>concentrate metabolites &excrete waste
breakage=cell death>leakage of CP
=phospholipid bilayer
=weak>osmotic lysis easy
=somewhat fluid
=low viscosity oil consistency
=HOPANOIDS in bact for strength
Phospholipid bilayer - Answer Fatty acids (inward)
Glycerol (outward/exposed)
Membrane proteins - Answer Outer surface: bind substrates or process large
molecules for transport
Inner surface:energy yielding reactions and
cellular functions
clustered to allow interaction or grouping of those with similar functions
Integral proteins - Answer embedded in the membrane
Peripheral proteins - Answer one portion anchored and other region pointed either into
or out of the cell
*lipoproteins-lipid tail that anchors into membrane
Associated proteins - Answer Not embedded but are firmly associated with membrane
surfaces
Archaeal membranes - Answer Ether bonds between glycerol and hydrophobic side
chains
*lipids lack fatty acids
*lipids=multiple 5C hydrocarbon isoprene
*cytoplasic membrane=glycerol diethers/
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