A leucine-zipper motif contains

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#Question id: 4765

#Unit 8. Inheritance Biology

The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?

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#Question id: 5352

#Unit 8. Inheritance Biology

Marriage occurs between individuals III-3 and III-6, what is the probability couple; son would be affected with the trait?

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#Question id: 6552

#General Aptitude

What is the next number in the sequence ? 39,42,46,50,?

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#Question id: 9218

#Unit 9. Diversity of Life Forms

What strategy was used to rescue Illinois prairie chickens from a recent extinction vortex?

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#Question id: 13065

#Unit 13. Methods in Biology

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.

Agglutination of antigens by utilising specific antibodies can only occur, if