Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Prokaryotic Cell Structure and Function: A Comprehensive Overview, Summaries of Microbiology

Cell Structure and Function. • Morphology: cocci, rods, spirilla, pleomorphic. • Prokaryotic structures: – Plasma membrane. – Inclusion bodies. – Ribosomes.

Typology: Summaries

2021/2022

Uploaded on 09/27/2022

gabryel
gabryel 🇺🇸

4.6

(18)

255 documents

1 / 36

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Cell Structure and Function
Morphology: cocci, rods, spirilla, pleomorphic.
Prokaryotic structures:
Plasma membrane
Inclusion bodies
Ribosomes
Nucleoid and genome organization
Endospores
Cell wall
Capsule
Fimbriae
Flagella and Chemotaxis
pf3
pf4
pf5
pf8
pf9
pfa
pfd
pfe
pff
pf12
pf13
pf14
pf15
pf16
pf17
pf18
pf19
pf1a
pf1b
pf1c
pf1d
pf1e
pf1f
pf20
pf21
pf22
pf23
pf24

Partial preview of the text

Download Prokaryotic Cell Structure and Function: A Comprehensive Overview and more Summaries Microbiology in PDF only on Docsity!

Cell Structure and Function

• Morphology: cocci, rods, spirilla, pleomorphic.

• Prokaryotic structures:

  • Plasma membrane
  • Inclusion bodies
  • Ribosomes
  • Nucleoid and genome organization
  • Endospores
  • Cell wall
  • Capsule
  • Fimbriae
  • Flagella and Chemotaxis

Bacterial Cell Shapes

Fig. 3.

Plasma Membrane

Lipid Structure

Fig. 3.

Fig. 3.

Plasma Membrane

• Selectively permeable barrier

• Site of enzymatic reactions

Cytoplasm: Packed with good

stuff

Fig. 3.

  • Fig. 12.

Prokaryotic vs. Eukaryotic

+ Prokaryotes Eukaryotes 30S 5 0S 70S Ribosome 30S 5 0S + 4 0S (^6) 0S 4 0S 6 0S 8 0S Ribosome

Genome organization

Prokaryotic

  • Single, circular chromosome
  • Extrachromosomal DNA= Plasmids
  • Haploid= 1 copy of each gene
  • No introns
  • Genes arranged in operons

Eukaryotic

  • Multiple, linear chromosomes
  • Plasmids limited
  • Diploid
  • Contain introns
  • One promoter for each gene

Operon organization

I B A H C D J K E F G PI PBA Regulatory proteins^ Major pilin protein Terminator/anchor protein Outer membrane channel Periplasmic transporter Minor pilin proteins Adhesin Initiator/adapter Tip-associated proteins Chaperonin H K^ E F^ G A Anchor Rod Tip

Endospores

  • Highly resistant to

environmental

conditions

  • Have no measurable

metabolism

  • Germinate under

favorable conditions

Image from Microbiology by Harely, Prescott, and Klein. 4th ed. Fig. 3.

Fig. 3. Model system: Bacillus subtilis

Peptidoglycan

Fig. 3.

Peptide interbridges

Fig. 3.