The piece of equipment, that introduces DNA into cells via DNA-coated microprojectiles is known as

1. laser

2. DNA probe

3. gene gun

4. inoculating needle

Which of the following enzyme is used to covalently bond foreign DNA to a vector plasmid?

1. DNA polymerase
2. Restriction endonuclease
3. DNA ligase
4. DNA helicase

Bacterial cells protect their own DNA from degradation by restriction endonucleases by

1. methylating the DNA at the sites that the enzyme recognizes
2. deleting all recognition sites from the genome
3. not producing any restriction endonucleases
4. having anti restriction endonucleases

Vectors are

1. molecules that degrade nucleic acids
2. molecules that help in replication
3. molecules that are able to covalently bond to and carry foreign DNA into cells
4. molecules that protect host cells from invasion by foreign DNA

Agrobacterium tumefaciens is

1. a disease in humans that causes loss of sight
2. a bacterium that can be used to introduce DNA into plants
3. a fungi that is used to produce antibiotics in large amounts
4. a disease in humans that causes loss of weight

A molecular technique in which DNA sequences between two oligonucleotide primers can be amplified is known as

1. southern blotting
2. northern blotting
3. polymerase chain reaction
4. DNA replication

The formulation with suitable preservatives in the case of drugs has to undergo
 1. Thorough clinical trials
 2. Thorough strict separation techniques
 3. Thorough harsh heat shock control
 4. Thorough long restriction digestion

Quality control testing is not

A.      A part of downstream processing

B.      Include separation and purification

C.      Both A and B

D.     Vary from product to product

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

The Agitation system of bioreactor has

1. Flat bladed impeller

2. Sharp impellers

3. Foam breaker

4. Steamer