Which of the following rRNA acts as structural RNA as well as ribozyme in bacteria?

1.	5S rRNA
2.	18S rRNA
3.	23S rRNA
4.	5.8S rRNA

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

A foreign DNA and plasmid cut by the same restriction endonuclease can be joined to form a recombinant plasmid using?

Which of the following is not a component of downstream processing?

Which of the following restriction enzymes produces blunt ends?

1. Sal l

2. Eco RV

3. Xho

4. Hind lll

Which kind of therapy was given in 1990 to a four-year-old girl with Adenosine Deaminase (ADA) deficiency?

1. Gene therapy

2. Chemotherapy

3. Immunotherapy

4. Radiation therapy

How many hotspots of biodiversity in the world have been identified till date by Norman Myers?

1. 17

2. 25

3. 34

4. 43

The primary producers of the deep-sea hydrothermal vent ecosystem are:
1. green algae
2. chemosynthetic bacteria
3. blue-green algae
4. coral reefs

Which of the following is correct for r-selected species?

1. Large number of progeny with small size

2. Large number of progeny with large size

3. Small number of progeny with small size

4. Small number of progeny with large size

If '+' sign is assigned to beneficial interaction, '–' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '–' refers to: