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(i) India born scientist who received Nobel Prize in 1968 for discovery of genetic code for amino acids is ———————

(ii) Transformation in bacteria was reported in 1928 by ———————

(ii)  ———————— put forward a classification system for streptococci based on antigen on their cell wall, in 1934,

(iv) —————- crystallized virus in 1935,

(v) —————— received Nobel Prize in physiology or medicine for their discoveries of genetic phenomena in microorganisms.

(vi)  ——————— are known for their work on viral infection of bacteria (1943).

(vii) O.T. Avery, C.M. MacLeod and M. McCarty in 1944 discovered that genetic material is DNA which work they did by noting transformation of nonpathogenic pneumococci (forming small colonies) to pathogenic pneumococci (forming large glistering colonies) by DNA from heat killed ———————

(viii) J. Lederberg and E.L. Tatum discovered that genetic material can be passed from one bacterium to another by the process of ———————

(ix) Francois Jacob and Jacques Monod discovered in 1961 that RNA is involved in _______

(x) In late 1960s Paul Berg spliced human or animal DNA to ———————

(xi) In 1959 viral cause of cancer was reported by ———————

(xii)_ In 1962 Edelman and Porter reported ———————

(xiii) In 1981 Marqulis contributed on origin of ———————

(xiv) Joseph Lister an English surgeon in 1867 used a dilute solution of ——————— to soak surgical dressings and to spray during an operation.

(xv) To immunize against chicken cholera in 1880 Louis Pasteur used pure culture of chicken cholera bacteria ———————


Ans.

(i) Har Gobind Khorana
(ii) Fred Griffith
(iii) Rebecca C. Lancefield
(iv) Stanley, Northrup and Sumner
(v) George W. Beadle, Edward L. Tatum and Joshua Lederberg
(vi) Delbriick and Luria
(vii) pathogenic pneumococci
(viii) Conjugation
(ix) protein synthesis
(x) bacterial DNA
(xi) Stewart
(xii) Antibodies
(xiii) eucaryotic cells
(xiv) Carbolic acid also known as phenol
(xv) 8 weeks old attenuated culture.

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