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TLS Online TPP Program

#Question id: 16135

You obtain 6 BACs (of known order, as shown below) and 7 STSs (of unknown order) that derive from a region of mouse chromosome 16 whose genomic sequence has not yet been finished.   
 
By PCR (using 20-bp primers at either end of each STS), you test each of the 6 BACs for the presence (+) or absence (-) of each of the 7 STSs. You obtain the following results:
 
Would you expect the DNA sequence of PCR product obtained at STS5 using mouse genomic DNA as template to more closely resemble that obtained using BAC B, BAC D, or BAC F? Briefly explain your answer.

#Unit 13. Methods in Biology
  1. STS 5 in twice our BACS, there are probably at least one STS 5 on the mouse chromosome. Only BAC B contains  STS5s.
  2. STS 5 in twice our BACS, there are probably at least two STS 5 on the mouse chromosome. Only BAC D contains both STS5s.
  3. STS 5 present in only one our BACS, there are probably at least one STS 5 on the mouse chromosome. Only BAC F contains  STS5s.
  4. STS 5 in twice our BACS, there are probably at least two STS 5 on the mouse chromosome. BAC B and F contains both STS5s.
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TLS Online TPP Program

#Question id: 7502

#General Aptitude

A train 220 m long is running with a speed of 59 kmph. In what time will it pass a man who is running at 7 kmph in the direction opposite to that in which the train is going?
TLS Online TPP Program

#Question id: 7503

#General Aptitude

Two trains 137 metres and 163 metres in length are running towards each other on parallel lines,one at the rate of 42 kmph and another at 48 kmph. In what time will they be clear of each other from the moment they meet?
TLS Online TPP Program

#Question id: 7504

#General Aptitude

Two train 100 metres and 120 metres long are running in the same direction with speed of 72 km/hr and 54 km/hr. In how much time will the first train cross the second?
TLS Online TPP Program

#Question id: 7505

#General Aptitude

A train running at 54 kmph takes 20 seconds to pass a platform .Next it takes 12 seconds to Pass a man walking at 6 kmph in the same direction in which the train is going. Find the length of the train and the length of the platform.
TLS Online TPP Program

#Question id: 7506

#General Aptitude

A man sitting in a train which is travelling at 50 kmph observes that a goods train,travelling In opposite direction,takes 9 seconds to paas him. If the goods train is 280 m long,Find its speed.
TLS Online TPP Program

#Question id: 7507

#General Aptitude

The lengths of trains A and B are 250 m 300 m respectively and their speeds are 70 km/h and 79 km/h respectively. They are walking in the same direction. In how much time will train B cross a passenger sitting in A?