Success Tip                                             Success Tip
 A chlorofluorocarbon (CFC)           is    an organic    A Barr body (named after discoverer Murray Barr) is
 compound that contains only carbon, chlorine,            the inactive X chromosome in a female somatic cell,
 and fluorine, produced as volatile derivative            rendered inactive in a process called lyonization, in
 of methane, ethane, and propane. They are also com-      those species in which sex is determined by the pres-
 monly known by the DuPont brand name Freon. The          ence of the Y (including humans) or W chromosome
 most common representative is dichlorodifluo-            rather than the diploidy of the X
 romethane. Many CFCs have been widely used                  l Marine sources has been particularly fruitful
 as refrigerants, propellants (in aerosol applications),        in finding novel anti-tumour agents such as bry-
 and solvents                                                   ostanns and dolostatins
   l The alkoloid naturally found in coffee, cocoa and       l If waste materials contaminate the source of
       cola nut is Caffeine                                     drinking water, Typhoid disease will spread
   l The metal used for making air-crafts and rock-          l Pulmonary Vein brings clean blood from the
       ets is Nickel                                            lungs into the heart
   l The process of improving the quality of rubber
       by heating it with sulphur is called Vulcaniza-
       tion                                                  l  Microsoft Power Point application in Microsoft
                                                                Office is feasible for preparing presentations
                        Success Tip
                                                             l  The language which was used to build Internet
 Vulcanisation is a chemical process for converting
                                                                Pages in the beginning of Internet Technology is
 natural rubber or related polymers into more dura-
 ble materials by the addition of sulphur or other
                                                             l  R.K. Narayan has written the famous book “Mal-
 equivalent curatives or accelerators
                                                                gudi Days”
   l Helium, Neon and Argon are noble gases
                        Success Tip                            SSC Graduate Level Tier-I Exam
 The noble gases make a group of chemical                              Held on: 19.10.2014
 elements with similar properties; under standard
 conditions, they are all odourless, colourless,         Ancient History
 monatomic gases with very low chemical reactivity.          l  Pancha siddhantharn of Varaha Mihira deals
 The six noble gases that occur naturally are helium            with Astronomy
 (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe),
                                                                                Success Tip
 and the radioactive radon (Rn)
                                                          The work is a treatise on mathematical astronomy
Biology                                                   and it summarises five earlier astronomical treatis-
   l   The biggest single-celled organism is Amoeba       es, namely the Surya Siddhanta, Romaka Siddhan-
                                                          ta, Paulisa Siddh-anta, Vasishtha Siddhanta and
                        Success Tip
                                                          Paitamaha Siddhanta
 An amoeba is a type of cell or organism which has
                                                             l Rupyaka coins was issued in silver during the
 the ability to alter its shape, primarily by extending
                                                                Gupta period
 and retracting pseudopods. Amoebas do not form a
 single taxonomic group; instead, they are found in          l Lothal, the dockyard site of the Indus Valley
 every major lineage of eukaryotic organisms                    Civilization, is situated In Gujarat
   l Crescograph was invented by J.C. Bose                   l Buddha means enlightened one
                        Success Tip                                             Success Tip
 A crescograph is a device for measuring growth in        A Buddha is one who has attained Bodhi; and by
 plants. It was invented in the early 20th century by     Bodhi is meant wisdom, an ideal state of intellectual
 Sir Jagadish Chandra Bose. The Bose crescograph          and ethical perfection which can be achieved by man
 uses a series of clockwork gears and a smoked glass      through purely human means. The term Buddha
 plate to record the movement of the tip of a plant       literally means enlightened one, a knower
 (or its roots) at magnifications of up to 10,000
                                                         Medieval History
   l Foramen Magnum is an aperture found in the
       Skull                                                 l  Qutbuddin Aibak died of a sudden fall from a
                                                                horse at Lahore while playing Chaugan
   l ‘Kelp’ is sea a weed rich in iodine content
   l Ethology the branch of Zoology that deals with      Modern History
       the scientific study of animal behaviour              l  Swami Vivekanand was responsible for the re-
   l ‘Barr body’ is found in female somatic cells               vival of Hinduism in 19th century