Practice Questions

TLS Online TPP Program

#Question id: 1021

Disease Control (CDC) determine that the agent causing the birds to die is the West Nile virus. Outbreaks of this illness have been observed in several other countries in Asia and the Middle East across the last 50 years, but not in the United States. With this information, what would be the best categorization of this infectious agent/disease

#SCPH28 | Zoology

This is clearly a reemerging infection. It's been around for a long time, and it is reappearing in a susceptible population again.
This is clearly a nosocomial infection. It's transmitted from animals to human beings in urban environments.
This is clearly an emerging infection. It hasn't been around that long, and it has made a jump across continents into a new susceptible population.
This is clearly not a concern to human beings--maybe it's emerging in animals, maybe it's reemerging, maybe it's nosomial. But who cares? It's only in birds.

More Questions

TLS Online TPP Program

#Question id: 10388

#SCPH06 I Botany

Phytochrome can interconvert between Pr and Pfr forms, Pr receives red light and converts into Pfr while Pfr receives far-red light and then converts into Pr, so which form of phytochrome is responsible for seed germinations?

TLS Online TPP Program

#Question id: 4354

#SCPH06 I Botany

Which of the following statements correctly describes the primary difference between enhancers and proximal control elements?

TLS Online TPP Program

#Question id: 2660

#SCPH06 I Botany

In the lactose operon, the molecule that causes the repressor to fall off the promoter is which of the following?

TLS Online TPP Program

#Question id: 9208

#SCPH06 I Botany

Which of the following threats to biodiversity is targeted at specific species rather than groups of species?

TLS Online TPP Program

#Question id: 13064

#SCPH01 Biochemistry

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 techniques doesn’t involve use of a secondary antibody?