Ohoud alhumaidan OUTLINE❑ History ❑ Prokaryote ❑ Introduction ❑ Bacteria size & shape ( Morphology + arrangement) ❑ Reproduction ❑ Classification ❑ Structure of bacterial cell 1. Capsule 2. Cell wall 3. Cell membrane ( cytoplasmic membrane) 4. Cytoplasm , chromosome and plasmid ...
Mycoplasmais a minute (50 -300 nm) bacteria without a cell wall. They do not have a fixed shape. Besides this natural bacteria, there are several other cell walls deficient forms like protoplasts, spheroplasts, and L-forms. Gram-Positive Cell-Wall vs Gram-Negative Cell-Wall Internal Structu...
number and arrangement of flagella on their surface; some have a single flagellum (monotrichous), a flagellum at each end (amphitrichous), clusters of flagella at the poles of the cell (lophotrichous), while others have flagella distributed over the entire surface of the cell (peritrichous...
Like archeans, bacteria are prokaryotic cells. This means that they are single-celled organisms without a nucleus membrane (nuclear envelope). While bacteria are very small, they are diverse and vary in shape and size.
Antony R 9:00Am-11Am Unknown Number 94 Unknown Results Streptococcus salivarius The first step in my unknown identification was to carry out a gram stain to observe the cell shape and arrangement. My unknown turned out to be gram positive bacteria cocci shaped with long chain cell arrangement....
Between the plasma membrane and the cell wall or outer membrane is the periplasmic space, which is a gel made up of water, nutrients, and proteins. Bacteria can be classified by their shape. The three basic shapes of bacteria include: coccus (plural: cocci) bacillus (plural: bacilli) and ...
For bacteria, the shape is defined and maintained by the cell wall (which consists of peptidoglycan, a cross-linked polymer). However, the mode and mechanism of division also help influence the type of shape that a given type of bacteria will have. ...
3. Arrangement Newly divided bacteria from certain genera have a special ability to stick together and form peculiar arrangements. For example, Streptococci often arrange themselves in chains, Staphylococci arrange themselves in irregular clusters, Diplococci can be seen arranging themselves in pairs. The...
The shape and size of bacteria of a given species can vary in culture with the age of the culture, the composition and pH of the medium, temperature, and staining method. Under given conditions, however, the predominating form, size, and arrangement of cells in a pure culture are quite ...
These may help with their locomotion, depending on the structure and type of bacteria. Similar to plant cells, most bacteria have cell walls. Cell walls give the cell support and contribute to its structure and shape. The five most common types of shapes in bacteria are:...