Which one of the following microbes causes acidification and curding of milk? 

A. Lactic Acid Bacillus 

B. Clostridium botulinum 

C. Vibrio cholerae 

D. Saccharomyces cerevisiae

Which one among the following waves carries the maximum energy per photon? 

A. X-rays 

B. Radio waves 

C. Light waves 

D. Microwaves

Who among the following shared the Nobel Prize in 1962 along with Francis Crick and James Watson for their discoveries concerning the molecular structure of nucleic acids? 

A. Erwin Chargaff 

B. Maurice Hugh Frederick Wilkins 

C. Rosalind Franklin 

D. Phoebus Levene

How much CO₂ is produced on heating of 1 kg of carbon? 

A. 11/3kg

B. 3/11

C. 4/3kg

D. 3/4kg

Who among the following is the winner of the Singapore Open superseries Badminton Men’s Singles title 2017? 

A. kidambi Srikanth 

B. Lin Dan 

C. B. Sai Praneeth 

D. Kento Momota

Which one of the following statements about a satellite orbiting around the Earth is correct 

A. Satellite is kept in orbit by remote control from ground station. 

B. Satellite is kept in orbit by retro-rocket and solar energy keeps it moving around the Earth.

C. Satellite reqmres energy from solar panels and solid fuels for orbiting. 

D. Satellite does not require any energy for orbiting.

The species that has the same number of electrons as ³⁵₁₇Cl is 

A. ³²₁₆S 

B. ³⁴₁₆S⁺ 

C. ⁴⁰₁₈Ar⁺ 

D. ³⁵₁₆S²⁻ 

Mariana Trench is located in the ‘ocean floor of 

A. Southern Atlantic Ocean 

B. Western Pacific Ocean 

C. Eastern Pacific Ocean 

D. Northern Atlantic Ocean

Melanin is the natural pigment that gives colour to human skin, hair and the iris. It provides protection against 

A. illtraviolet radiation 

B. Infrared radiation 

C. X-ray radiation 

D. Short wave radio radiation

How long does light take to reach the Earth from the Sun? 

A. About 4 minutes 

B. About 8 minutes 

C. About 24 minutes 

D. About 24 hours