Which of the following is the reason for the increased surface area for oxygen transfer in a sparged bioreactor ?

1. Bubbles

2. Turbidity

3. Cells

4. Protein

If a sample has a DNA of size 2kb and 6kb while the molecular marker denotes 4kb band as its the first band where will be the 6kb band of DNA?

1. bove the band of another DNA sample

2. Above the band of marker

3. In between the band of the marker and another band of DNA sample.

4. Both A and B

In the first gene cloning experiment:

An important limitation to the use of Agrobacterium tumefaciens is that it can not:

1. infect dicots

2. be genetically modified

3. be cultured on a nutrient medium

4. infect crop plants such as wheat and corn

The formulation with suitable preservatives in the case of drugs has to undergo

1.      Through clinical trials

2.      Through strict separation techniques

3.      Through harsh heat shock control

4.     Through long restriction digestion

Downstream processing is not

1.      Separation

2.      Purification

3.      Vary with product

4.     Occurs during the marketing phase

Quality control testing is not

1. A part of downstream processing
2. Include separation and purification
3. Both 1 and 2
4. Vary from product to product

The Downstream processing occurs after

1.      Biosynthetic phase

2.      Separation phase

3.      Purification phase

4.     All of these

Downstream processing includes

1.      Separation

2.      Purification

3.      Both 1 and 2

4.     Quality control Testing

Increased surface area for oxygen transfer is a feature found specifically in

1.      Simple stirred tank bioreactor

2.      Sparged stirred-tank bioreactor

3.      All stirred tank bioreactors

4.     All bioreactors have this property