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BMSC 210 > Lecture 4: Envelope of Microbial Cells > Flashcards

Lecture 4: Envelope of Microbial Cells Flashcards

1
Q

What is the cytoplasmic membrane composed of?

A

Phospholipid bilayer & ester linkage between head & tail

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2
Q

where is the hydrophobic portion found on a tail?

A

inside

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3
Q

where is the hydrophillic portion found on a head?

A

outside

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4
Q

What linkage do bacteria vs archaea have?

A

bacteria have ester linkage
archaea have ether linkage

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5
Q

what type of linkage has branched tails?

A

Ether

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6
Q

Bacteria vs Archaea cytoplasmic membrane

A

Bacteria- bilayer
Archaea-monolayer

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7
Q

Is the cytoplasmic membrane semi-permeable or permeable?

A

semi-permeable

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8
Q

what type of transport is effective at low concentration?

A

active

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9
Q

what type of transport if in-effective at low concentration?

A

simple

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10
Q

what type of diffusion does bacteria not use?

A

passive

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11
Q

what type of transport follows the michaelis menten equation? & why?

A

Active transport because it gets saturated

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12
Q

what does the PMF (protonmotive force) do?

A

moves stuff across membranes

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13
Q

what type of transporter is high at low concentrations?

A

high affinity transporter

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14
Q

what type of energy form is used during glucose active transport?

A

PEP

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15
Q

what is bacteria cell walls made of?

A

peptidoglycan

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16
Q

what does teichoic acid do?

A

makes the cell surface a negative charge

17
Q

what is peptidoglycan composed of in Bacteria?

A

NAG & NAM linked through B(1-4) linkage

18
Q

what is pseudomurein made of in archaea?

A

NAG & NAT linked through B(1-3) linkage

19
Q

what domain is insensitive to lyzosomes?

A

Archaea

20
Q

what are fungi cell walls composed of?

A

chitin

21
Q

does gram pos or neg have an outer membrane?

A

gram negative only

22
Q

what type of bacteria has LPS?

A

gram negative

23
Q

what is another name for LPS?

A

endotoxin

24
Q

what is endotoxin made of?

A

lipid A
Pyrogen
Septic shock

25
Q

what is the toxic portion of LPS?

A

Lipid A

26
Q

what are 2 methods to cross the outer membrane?

A

Classical porins & Substrate-specific porins

27
Q

what type of acids do acid fast bacteria have?

A

mycolic acids

28
Q

what type of bacteria does not have an S layer?

A

acid fast

29
Q

what bacteria has the braun lipoprotein

A

gram negative

30
Q

what linkage does eukarya have?

A

ester

BMSC 210 (16 decks)

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