CBSE ENGLISH LANGUAGE & LITERATURE

Detailed explanation-1: -Francis Crick (who co-discovered the structure of DNA with James Watson ) and Leslie Orgel once proposed that life on Earth was the result of a deliberate infection, designed by aliens who had purposely fled mother nature’s seed to a new home in the sun.

Detailed explanation-2: -Content. Francis Crick (1916-2004) was one of Britain’s great scientists. He is best known for his work with James Watson which led to the identification of the structure of DNA in 1953, drawing on the work of Maurice Wilkins, Rosalind Franklin and others.

Detailed explanation-3: -Colleague Maurice Wilkins showed Watson and Crick Franklin’s X-ray photographic work to Watson just before he and Crick made their famous discovery. The imagery established that the DNA molecule existed in a helical conformation. When Crick and Watson won the Nobel Prize in 1962, they shared it with Wilkins.

Detailed explanation-4: -In “A Structure of Deoxyribose Nucleic Acid, ” Watson and Crick described DNA as a double helix that contained two long, helical strands wound together. In their model, each DNA strand contained individual units called bases, and the bases along one DNA strand matched the bases along the other DNA strand.