TLS Online TPP Program

#Question id: 933


Industrially, nitrogen for use in fertilizers is converted to ammonia by ________.

#I Life Science/ Life Sciences Group – I-V
  1. a simple, energy efficient reaction of N2 with water

  2. a cryogenic (very low temperature) process between N2 and H2

  3. special catalysts which drive the reduction of N2 by H2

  4. a reaction between nitric acid and hydrogen gas

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TLS Online TPP Program

#Question id: 9231

#SCPH06 I Botany

Movement corridors can be harmful to certain species because they ________.

TLS Online TPP Program

#Question id: 13054

#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.
What would the expected effect be on a PCR reaction if the primers used were slightly shorter and more variable than the intended oligonucleotide sequences?

TLS Online TPP Program

#Question id: 5065

#SCPH28 | Zoology

Binding to the phosphorylated RTK through one of the RTK’s cytoplasmic domains, the adaptor protein also activates Ras. The activated receptor stimulates the adaptor protein to activate the:

TLS Online TPP Program

#Question id: 360

#SCPH06 I Botany

Which of the following is considered to be a strong base (alkali)?

TLS Online TPP Program

#Question id: 95

#SCPH28 | Zoology

What is the name of the disaccharide shown below that is formed by joining two monomers of D-glucose