1. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

2. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

3. Who invented Laser ?

Answer:

Charles H. Townes

4. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

5. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

6. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

7. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.