Structure and function of bacterial cells - summary bacterial cell structures

9 important questions on Structure and function of bacterial cells - summary bacterial cell structures

Function and composition of flagella:

Swimming movement, protein

Function and composition of sex pilus:

Stabilizes mating bacteria during DNA transfer by conjugation, protein

Function and composition of common pili/fimbriae:

Attachment to srufaces, protection agains phagotropic engulfment, protein
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

Function and composition of capsules:

  • Attachement to surfaces
  • protection against phagocytosis
  • reserve of nutrients
composition: usually polysaccharide, sometimes polypeptide

Function and composition of gram-positive bacteria:

  • Prevents osmotic lysis of cell
    • (protoplast = cell without or with part of cell wall)
  • Provides rigidy and shape for cells
composition: peptidoglycan complexed with teichoic acids

Function and composition of gram negative bacteria:

Peptidoglycan prevents osmotic lysis and gives rigidity and shape (outer membrane is permeability barrier, LPS has a function)
composition:
peptidoglycan surrounded by phospholipid protein lipopolysaccharide (outer membrane)

Function and composition of ribosomes:

Sites of translation (protein synthesis)
composition: RNA and protein

Function and composition of inclusions:

Reserves for nutrients (storage)
composition: varies a lot; carbohydrate/lipid/protein

Function and composition of plasmid:

Extrachromosomal material
composition: DNA

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo