Q. No.The bioreactor shown in the diagram is:
1. Sparged stirred tank type
2. Airlift type
3. Simple stirred tank type
4. Fluidized bed type
What is true about the steps of PCR shown in the diagram given below?
| I: | Step A occurs at the temperature of 95-98° C |
| II: | Step B occurs at the temperature of 55° C |
| III: | Step C occurs at the temperature of 72° C |
1. l and ll only
2. l and lll only
3. ll and lll only
4. l, ll and lll
The process of separation and purification of expressed protein before marketing is called
1. upstream processing
2. downstream processing
3. bioprocessing
4. postproduction processing
What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis ?
| 1. | The larger the fragment size, the farther it moves |
| 2. | The smaller the fragment size, the farther it moves |
| 3. | Positively charged fragments move to farther end |
| 4. | Negatively charged fragments do not move |
A gene, whose expression helps to identify transformed cells is known as
1. selectable marker
2. vector
3. plasmid
4. structural gene
The DNA fragments separated on an agarose gel can be visualised after staining with
1. bromophenol blue
2. acetocarmine
3. aniline blue
4. ethidium bromide
Stirred-tank bioreactors have been designed for:
1. purification of product
2. addition of preservatives to the product
3. availability of oxygen throughout the process
4. ensuring anaerobic conditions in the culture vessel
Which of the following is not a component of downstream processing?
1. Separation
2. Purification
3. Preservation
4. Expression
The Taq polymerase enzyme is obtained from
1. Thiobacillus ferroxidans
2. Bacillus subtilis
3. Pseudomonas subtilis
4. Thermus aquaticus
The cutting of DNA at specific locations became possible with the discovery of
1. restriction enzymes
2. probes
3. selectable markets
4. ligases
© 2026 GoodEd Technologies Pvt. Ltd.