TLS Online TPP Program

#Question id: 3351


In pre-industrial period in England, most peppered moths had light coloration. During industrial revolution, many lichens died out and trees became blackened by soot from factories and interestingly, dark colored moths were predominantly seen. Which of the following observation is incorrect about above selection?

#Section 3: Genetics, Cellular and Molecular Biology
  1. It is a directional or progressive selection

  2. Industrial melanism is an adaptation where the moths living in the industrial areas developed melanin pigment to hide themselves from their predators

  3. This happened due to natural selection of the camouflaging mechanism or the moths.

  4. It reduces the variations and maintains the mean value in a population, thereby preventing the evolutionary change

More Questions
TLS Online TPP Program

#Question id: 27361

#Section 5: Bioprocess Engineering and Process Biotechnology

A continuous stirred tank bioreactor produces 48 kg lysine.day-1. If the volumetric productivity is 2 g.l-1.h-1, the volume of the reactor is:

TLS Online TPP Program

#Question id: 27362

#Section 5: Bioprocess Engineering and Process Biotechnology

Continuous stirred tank fermenter is characterized by (biomass concentration X kg/m3, residual substrate is S kg/m3, Sf=substrate concentration in feed kg/m3, Dilution rate = D and µm>>D and Km<Sf, XD= the biomass productivity kg/m3h. If the dilution rate is doubled to 2D then the new steady state values in comparison with earlier steady state is characterized by

TLS Online TPP Program

#Question id: 27363

#Section 3: Genetics, Cellular and Molecular Biology

Match the types of RNA in Group I with their corresponding function in Group II



TLS Online TPP Program

#Question id: 27364

#Section 3: Genetics, Cellular and Molecular Biology

Which statement best describes the distinction between the purposes of the two RNAi pathways within the eukaryotic cell?

TLS Online TPP Program

#Question id: 27365

#Section 3: Genetics, Cellular and Molecular Biology

During siRNA-mediated gene silencing within the homo sapiens cell, the RNA-induced Silencing Complex (RISC) is composed of which of the following protein arrangements?

TLS Online TPP Program

#Question id: 27366

#Section 3: Genetics, Cellular and Molecular Biology

If the siRNA is a complete homolog of the target mRNA sequences what is the net result?