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flagellla
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What protein is the filament in a bacterial flagellum made of?
The filament in a bacterial flagellum is made of a protein called flagellin. Flagellin forms the helical structure of the flagellum filament, providing the bacterium with motility.
What organelle is whiplike in structure?
Flagella are the organelles in cells that are whiplike in structure. They are responsible for providing motility to certain cells, such as sperm cells in animals and algae cells in plants.
What are needed for bacterial conjugation pili or flagella?
Pili are needed for bacterial conjugation, as they are involved in the transfer of genetic material from one bacterium to another. Flagella, on the other hand, are involved in bacterial motility and help the bacterium move.
What is responsible for support structure and movement in cells?
The cytoskeleton is responsible for providing structural support and facilitating movement within cells. It is made up of protein filaments such as microtubules, actin filaments, and intermediate filaments that help maintain cell shape, enable intracellular transport, and allow for cell motility.
Are bacteria growing in the semi solid agar deep motile?
Bacteria growing in semi-solid agar may exhibit motility, but it depends on the specific bacterial species and their motility characteristics. Some bacteria are capable of moving through the semi-solid agar using flagella or other mechanisms, while others may not exhibit motility in that environment. Observation of individual bacterial species in semi-solid agar can determine if they are motile.
What feature bacterial culture will increase the probability of true motility?
motility
What protein is the filament in a bacterial flagellum made of?
The filament in a bacterial flagellum is made of a protein called flagellin. Flagellin forms the helical structure of the flagellum filament, providing the bacterium with motility.
What organelle is whiplike in structure?
Flagella are the organelles in cells that are whiplike in structure. They are responsible for providing motility to certain cells, such as sperm cells in animals and algae cells in plants.
What morphological structure is responsible for bacteria motility?
Bacteria commonly get their motility from an external structure(s) called a flagellum (if they have many, the plural form is flagella). Other motile bacteria have a cellular shape as a spiral (screw). The full mechanism of their motility is not understood. There are many types of spiral bacteria, some with and others without any flagellum. There are also bacteria (e.g. Magnetotactic bacteria and others) that will orient directionally, though not self-induced. They contain minerals such as iron in their cellular structure that orients or moves them slightly within magnetic fields. Other bacteria can also be vertically motile through changes in their bouyancy.
What are needed for bacterial conjugation pili or flagella?
Pili are needed for bacterial conjugation, as they are involved in the transfer of genetic material from one bacterium to another. Flagella, on the other hand, are involved in bacterial motility and help the bacterium move.
What are the methods used for identifying motility?
There are two basic method to determine motility in a bacterial sample. These samples have similar biochemical identifiers. The first test is a simple drop test. The second method employs a motility medium
Which of the following would be best observed for a bacterial cell using phase contrast microscopy?
Internal structures and motility of the bacterial cell would be best observed using phase contrast microscopy. This technique enhances the contrast of transparent specimens like bacterial cells, allowing for detailed visualization of their internal structures and any moving parts such as flagella.
Why is it why important to use a needle rather than an inoculating loop when inoculating for a bacterial motility test?
Using a needle rather than an inoculating loop for a bacterial motility test is important because the needle allows for a more precise and controlled inoculation into the medium. This method minimizes disturbance to the growth medium, enabling clearer observation of bacterial motility. The needle can create a narrow stab or line, which is essential for assessing the diffusion of motile bacteria away from the inoculation site, whereas a loop may disrupt the medium too much and complicate the interpretation of results.
What is the structure motility in Amoeba?
Amoeba moves by extending pseudopods, which are temporary projections of the cell membrane and cytoplasm. These pseudopods are formed when the cytoplasm flows in the direction of movement. This structure allows Amoeba to exhibit an adaptable and flexible form of motility.
Why are semisolid media sometimes preferred over techniques for evaluating bacterial motility?
Because it does not inhibit bacteria form "swimming" through the medium.
Why do you need a cavity slide to observe motility in living bacterial population?
A cavity slide is used to observe motility in living bacterial populations because it provides a shallow space that allows for easy observation of the organisms without trapping them in a thick layer of medium. This shallow depth minimizes the risk of pressure on the bacteria, which could hinder their movement. Additionally, the cavity slide facilitates the use of a microscope, enabling clear visibility of the bacteria's motility patterns and behaviors in real time.
What type of taxis is a bacterial cell exhibiting when it moves toward glucose in the environment?
Chemotaxis - this is the general term for bacterial motility when sensing a compound in the environment. If moving toward it is called positive chemotaxis, if away from it is negative chemotaxis.
