Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 11322
TLS Online TPP Program

#Question id: 3913

The sigma-70 subunit

#Section 3: Genetics, Cellular and Molecular Biology

  1. increases the affinity of the core polymerase for nonpromoter sequences.

  2. decreases the affinity of the core polymerase for specific promoter sequences.

  3. is responsible for transcribing many genes.

  4. is associated with a holoenzyme, enabling the formation of more stable complexes.

More Questions
TLS Online TPP Program

#Question id: 15561

#Section 6: Plant, Animal and Microbial Biotechnology

Which mechanism is helpful in secondary metabolite production
1. ppGpp secretion
2. Autoinducer
3. Nutrient limitation
4. Senescence genes
Which combination is incorrect  from the following.
TLS Online TPP Program

#Question id: 15562

#Section 6: Plant, Animal and Microbial Biotechnology

Deletion of which gene not only was accompanied by the abolition of antibiotic formation but also severely impaired growth on agar media.
TLS Online TPP Program

#Question id: 15563

#Section 5: Bioprocess Engineering and Process Biotechnology

How long will it take for the initial concentration of A to fall from 0.20 M to 0.075, if the rate constant for a reaction of zero-order in A is 0.035 mol L–1 s–1.
TLS Online TPP Program

#Question id: 15564

#Section 5: Bioprocess Engineering and Process Biotechnology

A substrate is consumed in a zero order reaction such that the concentration falls from 40 g/l to 20 g/l in 4 h. How long will it take the substrate to fall from 20 g/l to 2 g/l:
TLS Online TPP Program

#Question id: 15565

#Section 5: Bioprocess Engineering and Process Biotechnology

 In a first order reaction A→B. The plot is a straight line
TLS Online TPP Program

#Question id: 15566

#Section 5: Bioprocess Engineering and Process Biotechnology

Rate constant k for a first order reaction has been found to be 2.54 × 10-3 sec-1. Calculate its 3/4th life, (log 4 = 0.6020).