science & tech MCQ section 5 MCQ Questions & Answers Detailed Explanation

Answer: (c)

Answer: (c)

Interferons, Interleukins and Tumor necrosis factors are the proteins produced as a result of immune response to localized tissue damage.

Answer: (b)

This scorching achievement happened inside the Relativistic Heavy Ion Collider (RHIC), which is a 2.4-mile (3.9 kilometres) underground track where particles smash into one another under conditions that existed about a millionth of a second after the Big Bang.

The new feat, at Brookhaven National Laboratory in Upton, N.Y., occurred when gold nuclei (the positively charged part of the atom made of protons and neutrons) were sent speeding around RHIC at near light-speed until they crashed into each other.

When the ions collide, the enormous energy released is so, intense it melts the neutrons and protons inside the gold nuclei into their constituent parts, namely quarks and gluons.

RHIC physicists have measured the temperature of this quark-gluon plasma, finding it reaches around 7.2 trillion degrees Fahrenheit (4 trillion degrees Celsius).

Answer: (b)

EDUSAT or GSAT-3 is a communications satellite which was launched on 20 September 2004 by the Indian Space Research Organisation. EDUSAT is the first Indian satellite built exclusively to serve the educational sector.

Answer: (a)

In a nuclear disaster, the main focus is to cool the nuclear reactor. Pumping of water to the reactors and use of boric acid are some of the options.

Answer: (c)

Apsara became the first nuclear reactor of India in 1956. It was named by the then Prime Minister of India, Jawaharlal Nehru when he likened the blue Cerenkov radiation to the beauty of the Apsaras (Indra's court dancers). This first nuclear research reactor of India completed 50 years in August 2006.