James D. Watson When, in late March of 1953, Francis Crick and I came to write the first Nature paper describing the double helical structure of the DNA molecule, Francis had wanted to include a lengthy discussion of the genetic implications of a molecule whose struc ture we had divined from a minimum of experimental data and on theoretical argu ments based on physical principles. But I felt that this might be tempting fate, given that we had not yet seen the detailed evidence from King's College. Nevertheless, we reached a compromise and decided to include a sentence that pointed to the biological significance of the molecule's key feature-the complementary pairing of the bases. "It has not escaped our notice," Francis wrote, "that the specific pairing that we have postulated immediately suggests a possible copying mechanism for the genetic material." By May, when we were writing the second Nature paper, I was more confident that the proposed structure was at the very least substantially correct, so that this second paper contains a discussion of molecular self-duplication using templates or molds. We pointed out that, as a consequence of base pairing, a DNA molecule has two chains that are complementary to each other. Each chain could then act ". . . as a template for the formation on itself of a new companion chain, so that eventually we shall have two pairs of chains, where we only had one before" and, moreover, " ...

Bateson named the science "genetics" in 1905-1906. This is the first textbook in English on the subject of genetics.

General Knowledge is an important section of several competitive exams. Keeping an updated knowledge of it helps not only in exams, but at every aspects of life. General Knowledge 2020 has been revised for aspirants preparing for various upcoming exams to enhance eir general awareness so at ey can tackle e questions asked from numerous areas. It covers key subjects including History, Geography, Indian Polity, Indian Economy, General Science, and General Knowledge, wi latest facts and updates supported by figures, graphics and tables. It also provides a highly useful section on Current Affairs at e beginning which promotes factual knowledge from recent happening occurred at different areas. Providing accurate, perfect and complete coverage of facts, it is a complete general knowledge book, useful for e preparation of SSC, Bank, Railway, Police, NDA/CDS and various oer competitive exams. TOC Current Affairs, Indian History, Geography, Indian Polity, Indian Economy, General Science, General Knowledge

The History of Akbar, by Abu'l-Fazl, is one of the most important works of Indo-Persian history and a touchstone of prose artistry. It is at once a biography of the Mughal emperor Akbar that includes descriptions of his political and martial feats and cultural achievements, and a chronicle of sixteenth-century India.

This volume consists primarily of articles originally published in the nationalist newspaper Karmayogin between June 1909 and February 1910. It also includes speeches delivered by Sri Auro bindo in 1909. The aim of the newspaper was to encourage a spirit of nationalism, to help India recover her true heritage and remould it for her future. Its view was that the freedom and greatness of India were essential to fulfilling her destiny, to lead the spiritual evolution of humanity.

This text on building materials includes discussion of structural clay products, rocks and stones, wood, materials for making concrete, ferrous and non-ferrous metals, and miscellaneous materials.