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TLS Online TPP Program

#Question id: 3829

Why is only one copy of DNA made per cell division cycle in eukaryotes despite the presence of multiple origins of replication?

#Unit 3. Fundamental Processes

  1. There is only one origin of replication per chromosome.

  2. The rate of elongation proceeds at a rate that allows only one copy to be made by the time the cell divides.

  3. The activity of an S-phase protein kinase controls the formation of the pre-replication complex.

  4. Primase is activated by phosphorylation only at the onset of S-phase by S-phase protein kinase.

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TLS Online TPP Program

#Question id: 10757

#Unit 6. System Physiology – Plant

A Negative Hydrostatic Pressure in Soil Water,
TLS Online TPP Program

#Question id: 10977

#Unit 7. System Physiology – Animal

A 60-year-old man’s EKG shows that he has an R-R interval of 0.55 sec. Which of the following best explains his condition?
TLS Online TPP Program

#Question id: 33320

#Unit 1. Molecules and their Interaction Relevant to Biology

Identify the condition in the graph
TLS Online TPP Program

#Question id: 13056

#Unit 13. Methods in Biology

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 following is true for traditional and real time PCR?
TLS Online TPP Program

#Question id: 9166

#Unit 9. Diversity of Life Forms

If global warming continues at its present rate, which biomes will likely take the place of the coniferous forest (taiga)?