In cells that have been signaled to die via TNF-a receptor signaling but lack caspase-8 activity:

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#Question id: 30

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

Amongst the following chemical elements that are essential to organisms, which of the following set of elements have an atomic number above that of selenium?

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#Question id: 13057

#SCPH05 I Biotechnology

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?

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#Question id: 2282

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

Which of the following organelles is found in plant cells but not in animal cells?

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#Question id: 5014

#SCPH28 | Zoology

 Following geological time period and major evolutionary event?

I. Devonian                            A. Gymnosperms dominant

II. Jurassic                               B. Amphibians diversify; first reptiles

III. Carboniferous                  C. Mammals appear

IV. Triassic                           D. Seed plants appear

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#Question id: 3466

#SCPH06 I Botany

Animal preference of polygyny mating systems because of