Semi-solid media, prepared with agar at concentrations of 0.5% or less are useful for the cultivation of all of these Microaerophillic bacteria Lactobacilli E.coli TRUE ANSWER : ? YOUR ANSWER : ?
The cell mass can be measured optically by determining the amount of light scattered by a suspension of cells. The measurements are usually at a wavelength of 400-500nm 300-400nm 500-600nm 600-700nm TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is an abiotic elicitors? Osmotic shock Heavy metal ions UV irradiation All of these TRUE ANSWER : ? YOUR ANSWER : ?
Stringent anaerobes can be grown in a media by taking special measure as addition of cysteine boiling the media for several minutes passing through oxygen-free nitrogen any of these TRUE ANSWER : ? YOUR ANSWER : ?
For most bacteria, the optimum pH for growth lies between 6.5-7.5 3.5-4.5 4.5-5.5 5.5-6.5 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not an indirect method for the measurement of cell mass? Cell dry weight Viscosity Heat evolution Nutrient composition TRUE ANSWER : ? YOUR ANSWER : ?
The protoplast can be used to study plant viral infections modify genetic information all of these create plant hybrid TRUE ANSWER : ? YOUR ANSWER : ?
The archaebacterium Halobacterium, an extreme halophile, and Sulfolobus, a thermoacidophile, can be cultured in the presence of antibiotics such as streptomycin and chloramphenicol because All of these they lack murein in their cell wall they contain 80S, as opposed to 70S, ribosomes they contain ether-linked isoprenoids in their plasma membrane TRUE ANSWER : ? YOUR ANSWER : ?
Callus cultures are amorphous cell aggregates arising from the unorganized growth of explants on an aseptic solid nutrient medium solid nutrient medium liquid medium solid or liquid medium TRUE ANSWER : ? YOUR ANSWER : ?
The size of a single plant cell is usually within the range of 20-40μm in diameter and 100-200μm long 60-80μm in diameter and 300-400μm long 40-60μm in diameter and 200-300μm long 10-20μm in diameter and 25-100μm long TRUE ANSWER : ? YOUR ANSWER : ?