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TLS Online TPP Program

#Question id: 7154

Cancer is believed to often arise from stem cells, rather than fully differentiated cells. Which of the following are consistent with this view?

#Part-B Specialized Branches in Biotechnology
  1. Stem cells are actively dividing and express few differentiated functions, so they may have fewer changes to undergo than do fully differentiated cells in becoming cancer cells.
  2. DNA replication is necessary for mutations to occur, and stem cells are replicating their DNA whereas differentiated cells are for the most part not replicating their DNA.
  3. Teratocarcinomas are tumors that arise from germ cells or embryonic stem (ES) cells, under certain circumstances, demonstrating that tumors can arise from stem cells without further mutation.
  4. All of the above are reasons that cancer cells may more readily arise from stem cells than from fully differentiated cells.
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TLS Online TPP Program

#Question id: 7506

#Part-A Aptitude & General Biotechnology

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

#Part-A Aptitude & General Biotechnology

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?
TLS Online TPP Program

#Question id: 7508

#Part-A Aptitude & General Biotechnology

A boat running downstream covers a distance of 12 km in 2 h while for covering the same distance upstream it takes 3 h. What is the speed of the boat in still water?
TLS Online TPP Program

#Question id: 7509

#Part-A Aptitude & General Biotechnology

A boatman goes 3 km against the current of the stream in 1 h and goes 1 km along the current in 15 min. How long will it take to go 7 km in stationary water?
TLS Online TPP Program

#Question id: 7510

#Part-A Aptitude & General Biotechnology

A boat running upstream takes 5 h 12 min to cover a certain distance, while it takes 4 h to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?
TLS Online TPP Program

#Question id: 7511

#Part-A Aptitude & General Biotechnology

A man can row 19/2 km/h in still water. If in a river which is running at 5/2 km/h, it takes him 1 h 35 min to row to a place and back, how far off is the place?