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KEY FEATURES

Anatomical of Cyanobacteria

Cyanobacteria are prokaryotic cells, that lack a membrane-bound nucleus. 
They are also known as photoautotrophs. 

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Cell wall

The thinner cell wall composed of peptidoglycan on its inner wall
Lipopolysaccharides on the outer wall. Support the cell.

Gram-negative: thinner with an outer membrane

Peptidoglycan layer

Outer membrane 

Cell membrane

Slime coat

prevents bacteria from lysis

protect bacteria from dangers

controls passage of materials into cell

photosynthesis and cellular respiration

RubisCO

Nucleoid

Help with photosynthesis and cellular respiration

Chromosome (DNA) is located

Thykakoids

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contains phycobiliproteins to help with photosynthesis

Ribosomes

Capsule

Mucoid sheath 

Phycobilisomes

limit the ability of phagocytes to engulf the bacteria.

Protective barrier

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  • Carboxysomes: cyanobacteria use carboxysomes for concentrating CO2 and CO2-fixing enzymes.

  • Cyanophycin granula: nitrogen and carbon storage compound to help with fixed-nitrogen.

  • Vacuoles (gas vacuoles): use for floating toward the surface to avoid UV radiation. 

  • Movement: gliding motility.

  • Asexual reproduction: binary fission

  • Cyanobacteria is also known as:

PHOTOSYNTHETIC BACTERIA

(click to learn more)

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