2. Semi-solid media, prepared with agar at concentrations of 0.5% or less are useful for the cultivation of
3. 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
4. Which of the following is not an indirect method for the measurement of cell mass?
5. Callus cultures are amorphous cell aggregates arising from the unorganized growth of explants on an
6. The protoplast can be used to
7. The size of a single plant cell is usually within the range of
8. The archaebacterium Halobacterium, an extreme halophile, and Sulfolobus, a thermoacidophile, can be cultured in the presence of antibiotics such as streptomycin and chloramphenicol because
9. The isolation of the gonorrhoea - causing organisms, Neisseria gonorrhoeae,from a clinical specimen is facilitated by the use of media containing
10. Anchorage -dependent cells require
11. Stringent anaerobes can be grown in a media by taking special measure as
12. Radical shifts in pH can be prevented by incorporating
13. Which of the following is the necessary step for cultivating the microorganisms?
14. For most bacteria, the optimum pH for growth lies between
15. Which of the following is an abiotic elicitors?
16. Suspension cultures consist of cells and cell aggregates, growing dispersed in