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TLS Online TPP Program

#Question id: 12003

The  graph  below  shows  the  growth  rates  of  populations  of  bacteria  that  have  evolved  for  many  generations  at different culture temperatures (25°C, 30°C, and 35°C). Each population grows over only a limited range of temperatures (its thermal niche), which are bounded by its critical thermal limits. Within this range, growth rate increases with temperature up to a maximal value and then declines rapidly with increasing temperature. Growth rates are known to be the major determinant of fitness for these bacteria.

If all three populations were mixed together and placed at 37°C, which of the following would  be most likely to happen?

#Unit 10. Ecological Principles
  1. Only the population evolved at 25°C would die and become extinct. 
  2. Only the population evolved at 35°C would survive and reproduce.
  3. All the bacteria would die and the populations would become extinct.

  4. All populations would grow, and transfer of genes would create one common population.

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TLS Online TPP Program

#Question id: 20256

#Unit 12. Applied Biology

P5CS gene has been transferred and over expressed in tobacco. The leaves of transgenic plants retained a 
TLS Online TPP Program

#Question id: 20257

#Unit 12. Applied Biology

The primary function of accumulation of proline arid other solutes, e.g., glycine betaine appears to be the regulation of 
TLS Online TPP Program

#Question id: 20258

#Unit 12. Applied Biology

Glycine betaine appears to be the regulation of intracellular water activity; under water stress, they may induce the formation of 
TLS Online TPP Program

#Question id: 20259

#Unit 12. Applied Biology

Under stress condition expression of E, coli gene mtl 1D in plants leads to 
1. Mannitol accumulation 
2. Enhanced growth 
3. Reduced growth
4. Glucose accumulation 
Which of the following is correct option?
TLS Online TPP Program

#Question id: 20260

#Unit 12. Applied Biology

The modified forms of starch have varied applications in food and other industries. Basic strategies to modify starch quality are 
(i) genetic modification of crops (by breeding or biotechnology)
(ii) food processing (using enzymes and chemicals)
(iii) food supplementation (modification of starch by employing microorganisms)
Which of the following strategies are correct?
TLS Online TPP Program

#Question id: 20261

#Unit 12. Applied Biology

Certain modified forms of starch such as high amylose starch are widely used in 
1. Snack products
2. Improve uniformity, stability and texture
3. Thickener
Which of the following are correct?