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TLS Online TPP Program

#Question id: 8696

There is some evidence that reptiles called cynodonts may have had whisker-like hairs around their mouths. If true, then hair is a shared ________.

#SCPH06 I Botany
  1. derived character of mammals, even if cynodonts continue to be classified as reptiles
  2. derived character of all vertebrates and not of the mammal clade
  3. ancestral character of the all vertebrates, but only if cynodonts are reclassified as mammals
  4. derived character of mammals, but only if cynodonts are reclassified as mammals
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TLS Online TPP Program

#Question id: 8910

#I Life Science/ Life Sciences Group – I-V

Both animals and fungi are heterotrophic. What distinguishes animal heterotrophy from fungal heterotrophy is that only animals derive their nutrition
TLS Online TPP Program

#Question id: 27861

#Research Methodology

What type of chart is useful for comparing values over categories?
TLS Online TPP Program

#Question id: 13056

#SCPH01 Biochemistry

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: 1039

#SCPH06 I Botany

One of the first chemicals used by Lister to prevent surgical infections was
TLS Online TPP Program

#Question id: 2666

#SCPH05 I Biotechnology

A cell does not want to waste energy synthesizing the amino acid arginine if arginine is present in its diet. Therefore, when arginine is present, it activates a repressor protein to prevent transcription of genes that code for enzyme to make arginine. This is an example of what type of regulation?