Question -Match the names of the scientists listed in Column-I with their respective discoveries in Column-II. Column−IColumn−IIp.WatsonandCricki.ConfirmedthatDNAisthetransformingprincipleq.Avery,MacLeodandMcCartyii.DNAdoublehelicalmodelr.HersheyandChaseiii.FirstidentifiedDNAasthetransformingprinciples.Griffithiv.Existenceofa′transformingprinciple′
Options:
A .  p - ii, q - iii, r - i, s - iv
B .  p - iii, q - i, r - iv, s - ii
C .  p - ii, q - iv, r - i, s - iii
D .  p - iv, q - i, r - ii, s - iii
Answer: Option A : A Watson and Crick are known for the double helical model of DNA that they constructed. Griffith’s transformation experiments revealed that a “transforming principle” from heat-killed S strain of pneumococcal bacteria could transform the R strain into the live S strain. Avery, MacLeod and McCarty figured out that DNA isthe “transforming principle”. Hershey and Chase, through a cleverly developed experiment, re-confirmed that DNA, and not protein, is the genetic material in most organisms.
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