DNA replication is studied in a newly discovered bacterium. It takes 30 min for the bacterium to complete a round of replication at 37oC. A Meselson-Stahl-type experiment was performed. The bacteria were grown for several generations in 14N-medium and then switched to 15N-medium. The DNA molecules were then analyzed.

After one generation in 15N-medium, the DNA is denatured and analyzed in a CsCl gradient. If the single-stranded DNA forms two bands, one with heavy density and one with light density, what conclusion could be drawn about the mechanism of DNA replication in this bacterium?

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#Question id: 14779

#Unit 13. Methods in Biology

In a certain college, 4% of the men and 1% of the women are taller than 1.8m. Further 60% of the students are woman. If a student is selected at random and is taller than 1.8m, the probability that the student is women is

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#Question id: 14780

#Unit 13. Methods in Biology

A and B throws two dice; if A throws 9 then B’s chance of throwing a higher number is 1/6 , state whether the above statement is true or false.

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#Question id: 14781

#Unit 13. Methods in Biology

A pack of cards contains 4 aces, 4 queens and 4 jacks. Two cards are drawn at random. The probability that at least one of them is an ace is

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#Question id: 14782

#Unit 13. Methods in Biology

x is a random variable with mean    

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#Question id: 14783

#Unit 13. Methods in Biology

If A and B are two events such that P(A) = 0 and P(B) # 1, then is equal to

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#Question id: 14784

#Unit 13. Methods in Biology

Ten points are marked on a straight line and 11 points are marked on another straight line. If any three points are chosen, what is the probability that it forms a triangle?