Gene silencing by RNA interference acts by of the target gene.

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#Question id: 784

#SCPH05 I Biotechnology

Which is not a difference between B-DNA and A-DNA?

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#Question id: 495

#SCPH05 I Biotechnology

The main function of the pentose phosphate pathway is to:

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#Question id: 747

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

In nucleic acids, the bases are covalently attached to the 1-position of a pentose sugar ring, to form a:

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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: 4596

#SCPH28 | Zoology

In a hypothetical environment, fishes called pike-cichlids are visual predators of large, adult algae-eating fish (in other words, they locate their prey by sight). The population of algae-eaters experiences predatory pressure from pike-cichlids. Which of the following is least likely to result in the algae-eater population in future generations?