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TLS Online TPP Program

#Question id: 20318

Which statement is not correct about bacterial quorum sensing?

#Unit 4. Cell Communication and Cell Signaling
  1. The regulation of gene expression in response to fluctuations in cell-population density.
  2. A type of bacterial interaction is found to be involved in the development of antibiotic resistance by the pathogenic microorganisms.
  3. In quorum sensing (QS), small molecules (QS factors), often called ‘auto-inducers’, serve as signals that are recognized in a population-independent manner.
  4. Allows bacteria to monitor the environment for other bacteria and to alter behaviour on a population-wide scale in response to changes in the number and/or species present in a community 
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TLS Online TPP Program

#Question id: 6582

#General Aptitude

14

36

 

20

50

36

 

54

25

25

 

20

10

07

 

?


           

TLS Online TPP Program

#Question id: 6593

#General Aptitude

31

17

58

87

68

19

61

56

91

22

70

50

10

142

11

?

TLS Online TPP Program

#Question id: 13143

#Unit 10. Ecological Principles

The Norway rat (Rattus Norvegicus), a widespread pest, was controlled for about a decade by the anticoagulant warfarin. This chemical substance, placed in food pellets, is absorbed by the intestinal tract and inhibits the clotting of blood. After a population decline for about 10 years, rat populations increased and stabilized. In one European population, as illustrated in the graph below, the percentage of rats resistant to warfarin has remained fairly stable over a number of years.

Resistance to warfarin is governed by a dominant autosomal gene, R. More than 15 percent of the resistant animals are heterozygous at this locus (Rr). The table below indicates the response to warfarin and relative reproductive fitness of individuals that are homozygous or heterozygous for the dominant gene (R). The RR individuals have a 20-fold increase in vitamin K requirement over individuals.

Fitness is a measure of the reproductive success of a particular genotype. The highest fitness is 1.00.
In a population where warfarin is no longer applied, the expectation is that the
TLS Online TPP Program

#Question id: 7591

#General Aptitude

A pilot flies an aircraft at a certain speed for a distance of 800 km. He could have saved 40 min by increasing the average speed of the plane by 40 km/h. Find the average speed of the aircraft.
TLS Online TPP Program

#Question id: 28395

#Unit 5. Developmental Biology

One of the genes activated by VegT protein encodes the Sox17 transcription factor , these sox17 transcription factor is critical for which functions?