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Explain the Polycarbonate Nucleopore Filtre?
A given sample is filtered through a membrane filter, usually polycarbonate nucleopore filter with a pore size that will retain bacteria (generally 0.22 µm or 0.45 µm). Viable counts are made by placing the filter on agar medium plate or on an absorbent pad saturated with the culture medium. Alternatively, direct microscopic counts are made, the efficiency of which can be improved by using fluorescent dyes and epifluorescence microscope. Membrane filter technique can be used only for small samples of dilute homogenates.
The major component of food is protein. The proteins ingested as part of our diet are not the same proteins required by the body, nor can large molecules be absorbed from the gut.
In mountain rabbits, the EL-1 gene is located on chromosome 3. Seven alleles of this gene have been identified in the population. With respect to EL-1, what is the maximum number o
What do numeric pyramids represent? Numeric pyramids show the number of individuals in each trophic level of a food chain.
When a human donor gives a pint of blood, it generally requires how many weeks for body RESERVE of red corpuscles to be replaced? Is it: a) 7 week b) 3 weeks c) 1 weeks
root plants
WAXES These are monoglyceride compounds. They are chemically inert (due to absence of double bonds) and insoluble in water. On heating they become soft and pliable
Entomophily - Cross-pollination It involves insects to carry the pollen to achieve pollination. Salvia exhibits a specialised 'tumapipe' floral mechanism that signifies classi
Distribution of Nitrate Reductase and Nitrite Reductase Let us see whether nitrate assimilation depends upon the reductants produced in photosynthesis or in oxidative metaboli
Permanent Wilting Percentage (PWP) It is the percentage of moisture in the soil at which a plant wilts and does not recover unless water is added to the soil. PWP for clay is
Metastasis - Characteristics Define Cancer Metastasis is the capability of a malignant cell to detach itself from a tumor and establish a tumor in another site. This capabilit
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