science & tech MCQ section 6 MCQ Questions & Answers Detailed Explanation

Answer: (b)

INS Kolkata is the largest indigenous warship and is yet to be commissioned.

Answer: (b)

Hybridoma technology is used to commercially produce of monoclonal antibodies. The monoclonal antibodies are protective proteins produced by the clone of single immune cell.

Answer: (c)

BrahMos is a stealth supersonic cruise missile that can be launched from submarines, ships, aircraft or land. It is a joint venture between Republic of India's Defence Research and Development Organisation (DRDO) and Russian Federation's NPO Mashinostroeyenia.

Note : A hypersonic version of the missile, BrahMosII, is also presently under development with speed of Mach 7-8 to boost aerial fast strike capability. It is expected to be ready for testing by 2017. The name BrahMos is a portmanteau formed from the names of two rivers, the Brahmaputra of India and the Moskva of Russia. In 2016, as India became a member of the Missile Technology Control Regime (MTCR), India and Russia are now planning to jointly develop a new generation of BrahMos missiles with 600 km-plus range and an ability to hit protected targets with pinpoint accuracy.

Answer: (b)

RTS,S, world’s first malaria vaccine would be launched by 2015 by GSK.

Answer: (d)

The orbit of a planet around the Sun is an ellipse, with the Sun in one of the focal points of the ellipse. [This focal point is actually the barycenter of the Sun planet system; for simplicity, this explanation assumes the Sun’s mass is infinitely larger than that planet’s.] Within a planetary system, planets, dwarf planets, asteroids (a.k.a. minor planets), comets, and space debris orbit the barycenter in elliptical orbits.

A comet in a parabolic or hyperbolic orbit about a barycenter is not gravitationally bound to the star and therefore is not considered part of the star’s planetary system. Bodies which are gravitationally bound to one of the planets in a planetary system, either natural or artificial satellites, follow orbits about a barycenter near that planet.

Galileo believed that the inertial path of a body around the Earth must be circular. Lacking the idea of Newtonian gravitation, he hoped this would allow him to explain the path of the planets as circular inertial orbits around the Sun.

When Newton solved this problem, he showed that there are four possible paths for the planets: circular, elliptical, parabolic and hyperbolic (all are conic curves). The first two curves are closed and the other two are open curves. These results were obtained for the same energy and with the sun at rest.

Answer: (a)

CTBT is the universally accepted norm against nuclear testing has been respected by 183 countries since 1996.