1 Bacteria Structures + Functions at University Of Medicine And Pharmacy Of Iasi | Flashcards & Summaries

Select your language

Suggested languages for you:
Log In Start studying!

Lernmaterialien für 1 bacteria structures + functions an der University of Medicine and Pharmacy of Iasi

Greife auf kostenlose Karteikarten, Zusammenfassungen, Übungsaufgaben und Altklausuren für deinen 1 bacteria structures + functions Kurs an der University of Medicine and Pharmacy of Iasi zu.

TESTE DEIN WISSEN

Cell Wall-less Forms

Lösung anzeigen
TESTE DEIN WISSEN
  • A few bacteria are able to live or exist without a cell wall.
  • There are two groups of bacteria that lack the protective cell wall peptidoglycan structure, the
    Mycoplasma species, one of which causes atypical pneumonia (M. pneumoniae) and genitourinary tract infections (M. hominis) and the L-forms, which originate from Gram-positive or Gram-negative bacteria and are so designated because of their discovery and description at the Lister Institute, London (1935, Emmy Klieneberger- Nobel).
  • The mycoplasmas and L-forms are all Gram- negative in Gram staining (even L-forms origine can be from Gram positive bacteria to) and insensitive to penicillin and are bounded by a surface membrane structure.
  • L-forms arising "spontaneously" in cultures or isolated from infections (under antibiotics treatment) are structurally related to protoplasts and spheroplasts;
  • Spheroplasts (that lost their cell wall, from Gram-negative bacteria), and L-forms revert infrequently and only under special conditions.
Lösung ausblenden
TESTE DEIN WISSEN

Structures present in some strains of some species

Lösung anzeigen
TESTE DEIN WISSEN
  1. fimbriae (common pili)
  2. sex pili
  3. glycocalyx (capsule, microcapsule, loose slime) 
Lösung ausblenden
TESTE DEIN WISSEN

bacteria 

definition

Lösung anzeigen
TESTE DEIN WISSEN

prokaryotic cells

size: 1-10 um

relatively simple, unicellular

Lösung ausblenden
TESTE DEIN WISSEN

taxonomy

Lösung anzeigen
TESTE DEIN WISSEN
  • order
    • family
      • genus
        • species
          • strains
Lösung ausblenden
TESTE DEIN WISSEN

bacteria structure:

each cell consists of

Lösung anzeigen
TESTE DEIN WISSEN
  1. protoplast: the body of protoplasm
  2. cytoplasmic membrane: bacteria is enclosed by a thin, semipermeable membrane
  3. cell wall (in most cases): an outer, relatively rigig wall
Lösung ausblenden
TESTE DEIN WISSEN

primary taxonomic characters

= structures present in some species

Lösung anzeigen
TESTE DEIN WISSEN
  1. flagella
  2. spores (endospores)
  3. inclusion granules
Lösung ausblenden
TESTE DEIN WISSEN

Function of the bacterial DNA

Lösung anzeigen
TESTE DEIN WISSEN
  1. The bacterial DNA stores the genetic information.
  2. is involved in:
    1. autoreplication (copies of genetic information transmitted to daughter cells)
    2. heteroreplication (information is copied in mRNA sequences)
Lösung ausblenden
TESTE DEIN WISSEN

Essential structures, present in all bacteria

Lösung anzeigen
TESTE DEIN WISSEN
  1. protoplast with
    1.  cytoplasm and
    2. nuclear body (lacks nucleolus)
  2. cytoplasmic membrane
  3. cell wall
Lösung ausblenden
TESTE DEIN WISSEN

The main distinguishing features of the prokaryotic cell are:

Lösung anzeigen
TESTE DEIN WISSEN
  1. the nucleus appears as a simple, homogeneous body containing a single chromosome
  2. nucleus doesn´t possess a nuclear membrane separating it from cytoplasm 
  3. nucleus reproduces by binary fission, not by mitotic division
Lösung ausblenden
TESTE DEIN WISSEN

The main distinguishing features of the prokaryotic cell

Lösung anzeigen
TESTE DEIN WISSEN
  1. lacks internal membrane isolating respiratory + photosynthetic enzyme systems in specific organelles
  2. respiratory enzymes in bacteria are located mainly in the peripheral cytoplasmic membrane
  3. cytoplasm is a soft gel + has no internal mobility
  4. have 70 Svedberg unit ribosomes (instead of 80): 70 = 50 + 30 and 80 = 60 + 40
  5. Its rigid cell wall contains murein (the peptidoglycan gives strength) -> not found in eukaryotic organisms
  6. no steroids in the procaryotic cell wall (exception, mycoplasmas).
Lösung ausblenden
TESTE DEIN WISSEN

Protoplast

Lösung anzeigen
TESTE DEIN WISSEN
  1. cytoplasm
  2. nuclear body: contains genes, borne on chromosomes
Lösung ausblenden
TESTE DEIN WISSEN

The bacterial structures may be divided into 3 categories:

Lösung anzeigen
TESTE DEIN WISSEN
  1. essential structures (present in all bacteria)
  2. primary taxonomic characters: structures present in some species
  3. structures present in some strains of some species: facultative, inconstantly present
Lösung ausblenden
  • 4061 Karteikarten
  • 215 Studierende
  • 0 Lernmaterialien

Beispielhafte Karteikarten für deinen 1 bacteria structures + functions Kurs an der University of Medicine and Pharmacy of Iasi - von Kommilitonen auf StudySmarter erstellt!

Q:

Cell Wall-less Forms

A:
  • A few bacteria are able to live or exist without a cell wall.
  • There are two groups of bacteria that lack the protective cell wall peptidoglycan structure, the
    Mycoplasma species, one of which causes atypical pneumonia (M. pneumoniae) and genitourinary tract infections (M. hominis) and the L-forms, which originate from Gram-positive or Gram-negative bacteria and are so designated because of their discovery and description at the Lister Institute, London (1935, Emmy Klieneberger- Nobel).
  • The mycoplasmas and L-forms are all Gram- negative in Gram staining (even L-forms origine can be from Gram positive bacteria to) and insensitive to penicillin and are bounded by a surface membrane structure.
  • L-forms arising "spontaneously" in cultures or isolated from infections (under antibiotics treatment) are structurally related to protoplasts and spheroplasts;
  • Spheroplasts (that lost their cell wall, from Gram-negative bacteria), and L-forms revert infrequently and only under special conditions.
Q:

Structures present in some strains of some species

A:
  1. fimbriae (common pili)
  2. sex pili
  3. glycocalyx (capsule, microcapsule, loose slime) 
Q:

bacteria 

definition

A:

prokaryotic cells

size: 1-10 um

relatively simple, unicellular

Q:

taxonomy

A:
  • order
    • family
      • genus
        • species
          • strains
Q:

bacteria structure:

each cell consists of

A:
  1. protoplast: the body of protoplasm
  2. cytoplasmic membrane: bacteria is enclosed by a thin, semipermeable membrane
  3. cell wall (in most cases): an outer, relatively rigig wall
Mehr Karteikarten anzeigen
Q:

primary taxonomic characters

= structures present in some species

A:
  1. flagella
  2. spores (endospores)
  3. inclusion granules
Q:

Function of the bacterial DNA

A:
  1. The bacterial DNA stores the genetic information.
  2. is involved in:
    1. autoreplication (copies of genetic information transmitted to daughter cells)
    2. heteroreplication (information is copied in mRNA sequences)
Q:

Essential structures, present in all bacteria

A:
  1. protoplast with
    1.  cytoplasm and
    2. nuclear body (lacks nucleolus)
  2. cytoplasmic membrane
  3. cell wall
Q:

The main distinguishing features of the prokaryotic cell are:

A:
  1. the nucleus appears as a simple, homogeneous body containing a single chromosome
  2. nucleus doesn´t possess a nuclear membrane separating it from cytoplasm 
  3. nucleus reproduces by binary fission, not by mitotic division
Q:

The main distinguishing features of the prokaryotic cell

A:
  1. lacks internal membrane isolating respiratory + photosynthetic enzyme systems in specific organelles
  2. respiratory enzymes in bacteria are located mainly in the peripheral cytoplasmic membrane
  3. cytoplasm is a soft gel + has no internal mobility
  4. have 70 Svedberg unit ribosomes (instead of 80): 70 = 50 + 30 and 80 = 60 + 40
  5. Its rigid cell wall contains murein (the peptidoglycan gives strength) -> not found in eukaryotic organisms
  6. no steroids in the procaryotic cell wall (exception, mycoplasmas).
Q:

Protoplast

A:
  1. cytoplasm
  2. nuclear body: contains genes, borne on chromosomes
Q:

The bacterial structures may be divided into 3 categories:

A:
  1. essential structures (present in all bacteria)
  2. primary taxonomic characters: structures present in some species
  3. structures present in some strains of some species: facultative, inconstantly present
1 bacteria structures + functions

Erstelle und finde Lernmaterialien auf StudySmarter.

Greife kostenlos auf tausende geteilte Karteikarten, Zusammenfassungen, Altklausuren und mehr zu.

Jetzt loslegen

Das sind die beliebtesten 1 bacteria structures + functions Kurse im gesamten StudySmarter Universum

T6 -- plant structures & their functions

University of Aberdeen

Zum Kurs
CNS Function & Structure 3

University of Bradford

Zum Kurs
Skin Structure & Function

University of Bradford

Zum Kurs
Structure & Fonction 1

Universidad Cardenal Herrera-CEU

Zum Kurs
Structure & function

Cardiff University

Zum Kurs

Die all-in-one Lernapp für Studierende

Greife auf Millionen geteilter Lernmaterialien der StudySmarter Community zu
Kostenlos anmelden 1 bacteria structures + functions
Erstelle Karteikarten und Zusammenfassungen mit den StudySmarter Tools
Kostenlos loslegen 1 bacteria structures + functions