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MBY 251 Exam Questions With Correct Answers

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  • MBY 251

MBY 251 Exam Questions With Correct Answers Why is the morphology of a bacterial cell significant? - answerNutrient uptake Swimming motility Gliding motility Coccus - answerA spherical bacterium. Bacillus - answerRod shaped bacteria Spirillum - answerspiral shaped bacteria Spirochete - answ...

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  • September 17, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • MBY 251
  • MBY 251
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MBY 251 Exam Questions With Correct
Answers


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

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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

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