CELL CULTIVATIONS QUIZ

Semi-solid media, prepared with agar at concentrations of 0.5% or less are useful for the cultivation of

all of these

E.coli

Lactobacilli

Microaerophillic bacteria

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Callus cultures are amorphous cell aggregates arising from the unorganized growth of explants on an

solid nutrient medium

solid or liquid medium

aseptic solid nutrient medium

liquid medium

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The size of a single plant cell is usually within the range of

60-80μm in diameter and 300-400μm long

10-20μm in diameter and 25-100μm long

20-40μm in diameter and 100-200μm long

40-60μm in diameter and 200-300μm long

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The protoplast can be used to

create plant hybrid

all of these

modify genetic information

study plant viral infections

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Which of the following is not an indirect method for the measurement of cell mass?

Cell dry weight

Viscosity

Nutrient composition

Heat evolution

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Balanced growth is defined as

balancing the growth while controlling the pH

cultures undergoing balanced growth while maintaining a constant chemical composition

balancing the growth while changing the nutrient composition

balancing the growth while controlling the temperature

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Anchorage -dependent cells require

either (a) or (b)

dry surface for growth

nothing to do with the surface

wettable surface for growth

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Radical shifts in pH can be prevented by incorporating

an oxidizing agent

any of these

a reducing agent

a buffer

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Which of the following is an abiotic elicitors?

Heavy metal ions

UV irradiation

Osmotic shock

All of these

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For most bacteria, the optimum pH for growth lies between

5.5-6.5

4.5-5.5

3.5-4.5

6.5-7.5

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