TLS Online TPP Program

#Question id: 5761


E. coli cells were spread on an agar plate, producing 1000 colonies.  The colonies are replica plated on two agar plates containing the antibiotic kanamycin and one agar plate without antibiotics.  All of the colonies are able to grow on the agar plate without antibiotic but only 4 colonies are able to grow on each of the agar plates containing kanamycin.  You notice that the four colonies that grew on each of the kanamycin containing plates are in the exact same position.  This demonstrates

#Unit 8. Inheritance Biology
  1. how to screen for environmental mutagens

  2. that mutations occur in prokaryotes as well as in eukaryotes

  3. that in some cases mutations are caused by the selective agent itself

  4. a direct correlation between the amount of the selective agent used and the number of resistant mutants (one-hit relationship)

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TLS Online TPP Program

#Question id: 23635

#General Aptitude

Three individuals X, Y, Z hired a car on a sharing basis and paid Rs. 1, 040. They used it for 7, 8, 11 hours, respectively. What are the charges paid by Y?

TLS Online TPP Program

#Question id: 23636

#General Aptitude

A, B, C, D and E distribute some cards among themselves in a manner that A gets one less than B; C gets 5 more than D; E gets 3 more than B while D gets as many as b. who gets the least number of cards?

TLS Online TPP Program

#Question id: 23637

#General Aptitude

How many numbers from 1 to 100 are such each which is divisible by 8 and whose at least one digit is 8?

TLS Online TPP Program

#Question id: 23638

#General Aptitude

The minimum number of colours required to paint all the sides of a cube so that no two adjacent faces may have the same colour, is

TLS Online TPP Program

#Question id: 23639

#General Aptitude

There are three pillars X, Y and Z of different heights. There spiders A, B and C start of climb on these pillars simultaneously. In one chance A climbs on X by 5 cm but slips down 1 cm. B climbs on Y 6 cm but slips down 3 cm. C climbs on Z 7 cm but slips down 2 cm. If they each requires 50 chances to reach the top of the pillar, what is the height of the shortest pillar?

TLS Online TPP Program

#Question id: 23640

#General Aptitude

I was quite alone in the park. After some time an old man and an old woman came there. After them two couples with a baby came there. Now, how many persons are there?