A 20-1 stirred fermenter containing a Bacillus thuringiensis culture at 30°C is used for production of microbial insecticide, ka is determined using the dynamic method. Air flow is shut off for a few minutes and the dissolved-oxygen level drops; the air supply is then re-connected. When steady state is established, the dissolved-oxygen tension is 78% air saturation. The following results are obtained. Estimate ka.

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#Question id: 2076

#Section 3: Genetics, Cellular and Molecular Biology

An organism with a cell wall would most likely be unable to take in materials through:

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#Question id: 17661

#Section 4: Fundamentals of Biological Engineering

If the viscosity of a fluid increases with increasing stirrer speed, then the nature of the fluid is

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#Question id: 362

#Section 4: Fundamentals of Biological Engineering

A 0.01 M solution of a substance has a pH of 2. What can you conclude about this substance?

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#Question id: 2793

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Chromosome painting involves

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#Question id: 4756

#Section 3: Genetics, Cellular and Molecular Biology

In summer squash, white colour fruit (W) is dominant over yellow colour (w) and disc-shaped phenotype (D) is dominant over sphere-shaped phenotype (d). Determine the genotype of the parents gives 3/8 white, sphere, 3/8 white, Disk, 1/8 Yellow, Disk and 1/8 Yellow, Sphere?