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TLS Online TPP Program

#Question id: 4334

Which of the following is not true of RNA processing?

#SCPH28 | Zoology

  1. Exons are cut out before mRNA leaves the nucleus.

  2. Nucleotides may be added at both ends of the RNA.

  3. Ribozymes may function in RNA splicing.

  4. RNA splicing can be catalyzed by spliceosomes.

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TLS Online TPP Program

#Question id: 23251

#SCPH28 | Zoology

Which enzyme degrades the resulting component dNTPs and ATP if not incorporated in chain.
TLS Online TPP Program

#Question id: 14295

#SCPH05 I Biotechnology

Pseudomonas methylotrophus is used to produce single-cell protein from methanol in a 1000 m3 pressure-cycle airlift fermenter. The biomass yield from substrate is 0.41 g g- 1, KS is 0.7 mg l- 1, and the maximum specific growth rate is 0.44 h- 1. The medium contains 4% (w/v) methanol. A substrate conversion of 98% is desirable. The reactor may be operated either in batch or continuous mode. If operated in batch, an inoculum of 0.01% (w/v) is used and the downtime between batches is 20 h. If operated continuously, a downtime of 25 d is expected per year. Neglecting maintenance requirements, compare the annual biomass production from batch and continuous reactors?

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TLS Online TPP Program

#Question id: 13063

#SCPH06 I Botany

Precision will be reduced, but yield will be increased
Optimisation of a PCR reaction is often a compromise between the competing demands for precision, efficiency and yield. Although the specific effects may vary, generally, increasing the annealing temperature will increase non-specific primer binding and reduce precision. Increasing the length of the elongation phase will reduce the proportion of incomplete newly-synthesised strands and therefore increase yield. In this case, the potential effect on efficiency is unclear. Increasing the elongation phase would increase the reaction time, but the time taken to ramp down to a lower annealing temperature would be reduced.
Which of the statement is worng? Aminopetrin………s
TLS Online TPP Program

#Question id: 2073

#SCPH05 I Biotechnology

The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Phosphate import depends on a pH gradient across the membrane—more acidic outside the cell than inside the cell. In this bacterial cell, phosphate transport is an example of:
TLS Online TPP Program

#Question id: 2118

#SCPH06 I Botany

Which of the following statements correctly describes the normal tonicity conditions for typical plant and animal cells? The animal cell is in: