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TLS Online TPP Program

#Question id: 12918

Name the enzyme which helps in the DNA synthesis in the PCR.

#SCPH06 I Botany
  1. DNA polymerase
  2. DNA ligase
  3. DNA clamp
  4. Topoisomerase
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TLS Online TPP Program

#Question id: 2939

#SCPH28 | Zoology

Failure of which cell-cycle checkpoint is most likely to result in non-dysjunction?
TLS Online TPP Program

#Question id: 13057

#SCPH28 | Zoology

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.
How primer concentration leads to decrease in PCR efficiency?
TLS Online TPP Program

#Question id: 3853

#SCPH06 I Botany

In E. coli, promoter sequences are located at which of the following position(s) on the template strand?
TLS Online TPP Program

#Question id: 2637

#SCPH05 I Biotechnology

Which of these operons is anabolic?
TLS Online TPP Program

#Question id: 10906

#SCPH05 I Biotechnology

The pressure-flow model explains phloem translocation as a flow of solution (bulk flow) driven by an osmotically generated pressure gradient between source and sink.

a) Phloem translocation, both active and passive mechanisms were considered. All theories, both active and passive, assume an energy requirement in both sources and sinks.

b) In sources, energy is necessary to move photosynthate from producing cells into the sieve elements. This movement of photosynthate is called phloem loading.

c) In sinks, energy is essential for some aspects of movement from sieve elements to sink cells, which store or metabolize the sugar. This movement of photosynthate from sieve elements to sink cells is called phloem unloading.

d) The Active mechanisms of phloem transport further assume that energy is required in the sieve elements of the path between sources and sinks simply to maintain structures.

From the given statements find out the correct for pressure-flow model.