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MBY 251 Test With Complete Solution
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MBY 251 Test WithComplete Solution
Why is the morphology of a bacterial cell significant? - Answer Nutrient uptake
Swimming motility
Gliding motility
Coccus - Answer A spherical bacterium.
Bacillus - Answer Rod shaped bacteria
Spirillum - Answer spiral shaped bacteria
Spirochete - Answer spiral shaped bacteria
Epulopiscium fisheloni - Answer Giant Bacterium
Thiomagarita - Answer Giant Bacterium
How does the Epulopiscium fisheloni insure that it survives? - Answer It has multiple
copies of the same genes
How does nanobacteria have enough DNA to survive? - Answer They live in a symbiotic
relationship with other organisms
Is there a lower cell limit? - Answer Yes. A cell cannot be too small to house it's own
DNA.
Why must the cytoplasmic membrane be fluid? - Answer Allows for movement
Makes repairs easier
What is the composition of the cytoplasmic membrane? - Answer Phospholipid bilayer
Fatty acid points inward
Glyceraldehyde phosphate points outward
Function of cell membrane - Answer Permeability barrier
Transports nutrients
Composition of peptidoglycan - Answer glycan backbone( 2 sugars and amino acids)
, Peptidoglycan sugars - Answer N-acetylglucosamine
N-acetylmuramic acid
Peptidoglycan amino acids - Answer Alanine (D&L)
Glutamic Acid (D)
Lysine / diaminopimelic acid
Gram negative peptidoglycan cross links - Answer Direct link between DAP & -COOH of
D-alanine
Gram positive peptidoglycan cross links - Answer Peptide interbridge
Properties of bacterial membrane - Answer Ester linkage between glycerol
Fatty acid hydrocarbon
Bilayer membrane
Properties of archael membrane - Answer Ether linkage between glycerol
Isoprene hydrocarbon
Monolayer membrane
Simple transporters - Answer Has one component that gains energy from the PMF
Group translocation - Answer Driven by phosphoenolpyruvate
Group translocation enzymes - Answer HPr & enzyme 1: Non-specific
Enzyme 2a : Cytoplasmic
Enzyme 2b: Inner surface of membrane
Enzyme 2c: Integral
ABC transporters - Answer ATP driven
ABC proteins - Answer Periplasmic binding proteins
Membrane transporter
ATP-hydrolyzing protein
Gram positive cell wall - Answer Gram Reaction: Blue/Purple
Peptidoglycan: Thick
Teichoic acid: Lipoteichoic & wall teichoic
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