Bacteria having clusters of flagella at both poles of cells are known as?
Salmonella typhi has which type of flagella arrangement?
The L Ring in Gram-Negative bacterium flagella is associated with _
Which among the following acts as a transport protein for protons in flagellar motion?
F pilus has a major role as _
motility of the cell
port of entry of genetic material during mating
attachment to host cell
Prosthecae helps in __
nutrient absorption and attachment to surfaces
protection from the environment
The capsule of Klebsiella pneumoniae is composed of heteropolysaccharides.
When a bacteria swim towards a chemical, it is termed as__________
Which type of force drives the flagellar motion?
Protonmotive and ATP driven
No protonmotive nor ATP driven
Explanation: In amphitrichous, flagella occur either singly or in clusters at both cell poles. Lophotrichous refers to a cluster of polar flagella, peritrichous is surrounded by lateral flagella and monotrichous is for a single polar flagella.
Explanation: Salmonella typhi has peritrichous type of flagella arrangement. In peritrichous, the bacteria are surrounded by lateral flagella.
Explanation: The flagella in Gram-Negative bacteria has four basal rings. The L Ring of flagella is associated with the outer membrane. The P ring is associated with the peptidoglycan layer and both the M and S rings are associated with the cytoplasmic membrane.
Explanation: The proton binds to the Mot protein and this changes the conformation of Mot protein. It results in releasing the ring and helps in flagellar motion. The fli protein helps in changing the direction of flagella.
Explanation: Pili are hollow, filamentous appendages that are thinner and shorter. They do not function in motility and have other different functions. One type known as F plus or sex plus serves as the port of entry of genetic material during bacterial mating.
Explanation: Prosthecae increases the surface area of the cells for nutrient absorption, which is advantageous in dilute environments. Some prosthecate bacteria have an adhesive substance at the end of a prostheca that aids in attachment to surfaces.
Explanation: Heteroploysaccharides are usually synthesized from sugar precursors that are activated within the cell, attached to a lipid carrier molecule, transported across the cytoplasmic membrane and polymerized outside the cell. The capsule of Klebsiella pneumoniae is an example of heteropolysaccharides.
Explanation: When a bacteria swim towards or away from chemical compounds, the phenomenon is known as bacterial chemotaxis. Swimming towards a chemical is termed as positive chemotaxis; swimming away is negative chemotaxis.
Explanation: It is found that the flagellar motor is driven by the protonmotive force, i.e., the force derived from the electrical potential and the hydrogen-ion gradient across the cytoplasmic membrane.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.