Which one of the following sets of Elements was primarily responsible for the origin of life on the earth?

• Hydrogen, Oxygen, Carbon, Sodium
• Oxygen, Carbon, Calcium, Phosphorus
• Carbon, Hydrogen, Oxygen, Nitrogen
• Carbon, Hydrogen, Nitrogen, Potassium
Correct Option: C  [ Carbon, Hydrogen, Oxygen, Nitrogen ]

Remark:

The growth of bacteria is measured by:

• hemocytometer
• spectrophotometer
• calorimeter
• auxanometer
Correct Option: B  [ spectrophotometer ]

Remark:

Which one of the following allows sound waves to travel comparatively faster at 0°C ?

• Water
• Air
• Ice
• Iron
Correct Option: D  [ Iron ]

Remark:

In a computer, the parity bit is added for the purpose of:

• Coding
• Error detection
• Controlling
• Indexing
Correct Option: B  [ Error detection ]

Remark:

The technique of 'DNA sequencing' was discovered by:

• H. G. Khorana
• Watson and Crick
• Frederick Sanger
• E. M. Southern
Correct Option: B  [ Watson and Crick ]

Remark:

"Zoonosis" refers to any disease or infection that is naturally transmissible from:
(i) human to human
(ii) animal to human
(iii) animal to animals
(iv) bird to animal
Select the correct answer using the codes given below.

• Only (i) and (iii)
• Both (i) and (ii)
• Both (iii) and (iv)
• Only (ii)
Correct Option: D  [ Only (ii) ]

Remark: A zoonosis is an infectious disease that has jumped from a non-human animal to humans.

Oncology is the study of

• Branch of science that deals with eyes
• Branch of science that deals with Brain
• Branch of science that deals with Tumours and Cancers
• Branch of science that deals with Blood Circulation
Correct Option: C  [ Branch of science that deals with Tumours and Cancers ]

Remark:

All ships have sonar system. It is used to detect /measure :

• Distance of the shore
• Sound on the surface
• Sound of animals in Sea
• Depth of ocean
Correct Option: D  [ Depth of ocean ]

Remark:

A CD-ROM is a kind of:

• Optical disk
• Magnetic disk
• Fibre disk
• None of these
Correct Option: A  [ Optical disk ]

Remark:

What is the first artificial satellite to orbit Earth ?

• Sputnik I
• Explorer I
• Vanguard I
• Discoverer I
Correct Option: A  [ Sputnik I ]

Remark: