The paradigmatic adult stem cell niche, contains several cell types that coordinate HSC development, including in column I and column II

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#Question id: 24476

#Unit 3. Fundamental Processes

Which of the following is correctly representing the position of  TATA box 

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#Question id: 976

#Unit 1. Molecules and their Interaction Relevant to Biology

Which amino acid is not directly involved in the de novo biosynthesis of purines?

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#Question id: 574

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statements is FALSE?

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#Question id: 5256

#Unit 8. Inheritance Biology

If the experimental population of E. coli lacks an F factor or F plasmid, and if bacteriophage are excluded from the bacterial cultures, then which of these is a means by which beneficial mutations might be transmitted horizontally to other E. coli cells?

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#Question id: 13059

#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.

Efficiency during ligation of blunt ended insert and vector cannot be cannot be enhanced by means of…..