MIMG 101 - Chap 3 & 5 Questions and
Correct Answers.
Gram +ve key characteristics - Answer thick peptidoglycan
no outer membrane
teichoic acids
stain purple
smaller periplasmic space
= peptidoglycan + plasma membrane
monoderm
Gram -ve key characteristics - Answer thin peptidoglycan layer
outer membrane
LPS --> Lipid, lipoproteins, lipopolysaccharides
stain pink or red
larger periplasmic space
no teichoic acids
movement in outer mem is restricted --> transport by porins
Braun's lipoprotein
diderm
prokaryote only - Answer no membrane bound organelles
no true nucleus
unicellular
0.1-5micrometers
cell wall
asexual reproduction
= bacteria and archaea
eukaryote only - Answer membrane bound organelles
true nucleus
uni, multicellular
10-100 micrometers
asex and sexual reproduction
= protists and fungi
, prokaryote and eukaryote both - Answer ribosome
cell membrane
has DNA
cytoplasm
bacterial DNA - Answer circular DNA --> in nucleoid
DNA - no associated proteins
plasmids
eukaryotic DNA - Answer Linear DNA molecule in nucleus
DNA associated with histone proteins
no plasmids
bacterial plasma membranes - Answer composed of lipid bilayers
mainly phospholipids
hopanoids (similar to cholesterol)
eukaryotic plasma membranes - Answer lipid bilayer
phospholipids
high proportion of shingolipids and sterols
cytoskeleton - Answer protein filaments that form functional filaments that extend to fuller
inner dimensions of the cell
cytoskeleton function - Answer participate in:
cell division
localize proteins
maintain cell shape
eukaryotic cytoskeleton - Answer actin, microtubules, intermediate filaments
bacterial cytoskeleton - Answer homologs of actin, microtubules, and intermediate filaments
+ FtsZ: in many bacteria
+ MreB: rods
Correct Answers.
Gram +ve key characteristics - Answer thick peptidoglycan
no outer membrane
teichoic acids
stain purple
smaller periplasmic space
= peptidoglycan + plasma membrane
monoderm
Gram -ve key characteristics - Answer thin peptidoglycan layer
outer membrane
LPS --> Lipid, lipoproteins, lipopolysaccharides
stain pink or red
larger periplasmic space
no teichoic acids
movement in outer mem is restricted --> transport by porins
Braun's lipoprotein
diderm
prokaryote only - Answer no membrane bound organelles
no true nucleus
unicellular
0.1-5micrometers
cell wall
asexual reproduction
= bacteria and archaea
eukaryote only - Answer membrane bound organelles
true nucleus
uni, multicellular
10-100 micrometers
asex and sexual reproduction
= protists and fungi
, prokaryote and eukaryote both - Answer ribosome
cell membrane
has DNA
cytoplasm
bacterial DNA - Answer circular DNA --> in nucleoid
DNA - no associated proteins
plasmids
eukaryotic DNA - Answer Linear DNA molecule in nucleus
DNA associated with histone proteins
no plasmids
bacterial plasma membranes - Answer composed of lipid bilayers
mainly phospholipids
hopanoids (similar to cholesterol)
eukaryotic plasma membranes - Answer lipid bilayer
phospholipids
high proportion of shingolipids and sterols
cytoskeleton - Answer protein filaments that form functional filaments that extend to fuller
inner dimensions of the cell
cytoskeleton function - Answer participate in:
cell division
localize proteins
maintain cell shape
eukaryotic cytoskeleton - Answer actin, microtubules, intermediate filaments
bacterial cytoskeleton - Answer homologs of actin, microtubules, and intermediate filaments
+ FtsZ: in many bacteria
+ MreB: rods
