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Calculate the number 2421

NUMBERMANIA: Calculate the number 2421 using numbers [2, 7, 9, 8, 97, 785] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 1

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A Taxi Driver and a Priest Die…

He waits for a long time and finally goes to St. Peter and asks: "Why could that taxi driver go to the highest level of heaven and I, who all my life spoke about God, have to wait for such a long time?"
St. Peter replies: "When you were speaking to the people at your church, everybody was sleeping. But when that taxi driver was driving, everybody prayed!"

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Virus DNA

In 1944, DNA was identified as the hereditary agent in a virus, published in a report by O.T. Avery, Colin MacLeod, and Maclyn McCarty. This crucial discovery in molecular genetics - that genetic information is carried in the nucleotide sequence of DNA - arose incidentally while studying pneumococcus to monitor the epidemic spread of pneumonia. Since 1928, when British physician Frederick Griffith had found that extracts of a pathogenic strain of that virus could transform a harmless strain into a pathogenic one, scientists had searched for the "transforming factor." The work by Avery, et al., now identified the transforming molecule as DNA, having ruled out, through extract digestions, RNA, protein, and polysaccharide capsular material.[Ref.: Studies on the chemical nature of the substance inducing transformation of pneumococcal types. Induction of transformation by a deoxyribonucleic acid fraction isolated from pneumococcus type III. Journal of Experimental Medicine. 79:137-158., issue of 1 Feb 1944]

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