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L3 Flashcards

(9 cards)

1
Q

What are mesosomes?

A

extensions/invagination of cell membrane

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2
Q

types of mesosomes

A
  1. vesicles
  2. lamellae
  3. tubule
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3
Q

difference between PILI and FIMBRIAE?

A

PILI
1.LONG, tubular, elongated, made of pilin protein

FIMBRIAE
1. SHORT, MORE in number, bristlle like

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4
Q

which is present more in number? pill or fimbraie?

A

fimbrae

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5
Q

characteristics of pili and fimbrae?

A

present on surface of bacteria

  1. non-locomotory
  2. they are hair-like structure.
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6
Q

in prokar. flagella are the extension of____

in eukar. flagella are the extension of____

A

cell wall

cell membra

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7
Q

flagella of prok and eukar ? are they same or different

A

different,

in prok - they are extensions of cell wall
in euk- they are extension of cell memb

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8
Q

what is GRAM STAINING METHOD?

A

bacteria is stained with crystal-violet(violet / purple / red in color),

  1. after the bacteria attains the color of dye, it is then alcohol washed,
  2. if it retains the color (CRYSTAL VIOLET) ; then we classify it as G+ve
  3. if it looses the color (CRYSTAL VIOLET); then again it is stained with SAFRANIN PINK, and we classify it as G-ve.
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9
Q

gram staining is classified into 2 types name them? and also tell the basis of its classification:

A

G+ve and G-ve

on the basis of staining procedure and cell envelope composition

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