1.2 Eubacteria (True Bacteria) Flashcards
There are thousands of different Eubacteria or ‘true bacteria’.
T/F
True
Eubacteria are characterised by the presence of a rigid cell wall, and if motile, a flagellum.
T/F
True
Photosynthetic Eubacteria have ____ (chl-a/chl-b).
Chlorophyll a (similar to green plants)
Example of Photosynthetic Eubacteria.
Cyanobacteria (blue-green algae)
Select the feature of Blue Green Algae:
- Unicellular or Multicellular
- Colonial or Filamentous
- Freshwater, Marine or Terrestrial
I. Unicellular
II. Colonial or filamentous
III. Freshwater, marine, or terrestrial
Cyanobacteria are generally surrounded by ______ sheath.
Gelatinous or Mucilagenous sheath
Cyanobacteria often form _____ in polluted water bodies.
Blooms
Some Cyanobacteria can fix atmospheric nitrogen in specialized cells called ______.
Examples of these cyanobacteria.
Heterocysts;
E.g., Filamentous BGA (Nostoc & Anabaena)
Chemosynthetic Eubacteria oxidize inorganic substances such as ______ and use the released energy for ATP production.
Nitrates, Nitrites & Ammonia
Chemosynthetic Eubacteria help in recycling nutrients like:
I. Nitrogen
II. Phosphorus
III. Iron
IV. Sulfur
Heterotrophs Eubacteria are the most abundant in nature.
T/F
True
Some of the Heterotroph Eubacteria are important decomposers.
T/F
False,
The majority of Heterotroph Eubacteria are important decomposers.
Many Heterotroph Eubacteria have a significant impact on human affairs.
T/F
True
Heterotroph Eubacteria help make curd from milk, production of antibiotics, fix nitrogen in legume roots, etc.
T/F
True
Some of the Heterotrophic Eubacteria are pathogens that cause damage to human beings, crops, farm animals and pets.
T/F
True
Well-known diseases caused by Heterotrophic Eubacteria are:
Cholera, typhoid, tetanus, citrus canker
Topic - Reproduction in Bacteria
Bacteria reproduce Asexually:
- Mainly by:
- Under unfavourable conditions:
a. Binary Fission
b. By producing spores
Bacteria reproduce mainly by fission.
T/F
True
Bacteria also reproduce by a sort of sexual reproduction by adopting a primitive type of DNA transfer from one bacterium to the other.
T/F
True
Topic - Mycoplasma
______ is the smallest living cell.
Mycoplasma
Mycoplasma are the only prokaryotes that lack cell walls.
T/F
True
Are Mycoplasma examples of Autotrophic or Heterotrophic Eubacteria?
Heterotrophic Eubacteria
Mycoplasma can’t survive without Oxygen.
T/F
False,
They can survive without Oxygen
Many Mycoplasma are _____ (symbiotic/pathogenic) in animals and plants.
Pathogenic
