Bacteria

What are the simplest prokaryotic

organisms without nuclear membrane are called

------- are the simplest prokaryotic (organisms without nuclear membrane) microorganisms having the common chemical composition of DNA, RNA and protein.

Bacteria are the simplest prokaryotic (organisms without nuclear membrane) microorganisms having the common chemical composition of

were among the first living things to appear on Earth, and are present in the soil, water, acidic hot springs, radioactive wastes, and the deep portions of the Earth’s crust.

Bacteria were discovered by

Bacteria was discovered in wgat year?

Who intodyced the word"bacterium"

Thecword bacterium was introduced when?

They also cannot live in symbiotic and parasitic relationships with plants and animals

There are approximately ------bacteria on Earth

The branch in microbiology concerned in the study of bacteria is called?

The branch in microbiology concerned in the study of bacteria(bacteriology) was discovered by

Bacterias are disease causing agents aka

A typical bacterial cell measures a few micrometers

Bacteria belongs to whqt kingdom

Bacterias are over --- species

A bacterias shape could be

Spherical bacteria;

Rod shaped bacteria;

Slightly curved rods or comma shaped bacteria;

Spiral shaped bacterium

tightly coiled bacteria

paired cocci as a result of division.

Cocci arranged in chains due to successive cell divisions in the same axis.

Cocci arranged in cubical packets of 8 or multiples of 8 due to division in 3 planes at right angles to each other.

Coccus that divides in 2 planes and remain in groups of 4

Presence of a single polar flagellum at one end of the cell

Presence of several flagella at one or both end(s) of the cell.

Another name for Staphylococcus is?

Presence of several flagella over the entire cell surface.

Presence of a single flagellum or multiple flagella at both ends of the cell.

A typical bacterial cell can be divided into

A typical bacterial cell can be divided into 5 regions namely;

Syrface appendages are the

-----is the rigid structure, about 20 nm in diameter and up to 20 µm in length used for motility.

A flagella is how long in diameter and length

Protein structures of a flagellum is called what?

--------originates from the cytoplasm, and it is many times longer than the bacterial cell.

A flagellum consists of how many parts?

A flagellum consists of 3 part namely

-----are distributed over the surface of the cell wall, and resemble fine hairs when viewed under the electron microscope

They are fine filaments of protein, usually 2-10 nm in diameter and up to several µm in length.

Fimbriae are shorter and stiffer than flagella.

------are small tube-like projections found on the surface of a bacterial cell wall

They are similar to the fimbriae in structure, but slightly larger

Surface Adherents are also called

Surface Adherents or Glycocalyx are the

s a disorganised layer of extra-cellular polymer which is non-fluid in consistency

• is the outermost layer of the bacterial cell and is relatively narrow and well defined

Capsule is highly structured and composed of?

Macro capsule is greater than - in thickness

Micro capsule is less than -- in thickness

common bacterial cell wall material is?

common bacterial cell wall material is peptidoglycan which is made up of?

The cell accounts for --- percent of the dry weight of the bacterial cell.

How many types of cell walls does a bacteria have?

There are broadly speaking two types of cell wall in bacteria

Bacterial cells which retain the Gram stain after alcoholic treatment are termed

Gram stain after alcoholic treatment are termed

Gram Staining Test: It was devised by who

Grams straining test was devised in what year

The preparation is then treated with ----- for the decolorization test

The Gram Staining Test can be observed by