Enzymes that remain bound to their nascent chains through many polymerization steps are said to be ________.

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#Question id: 13062

#Section 7: Recombinant DNA technology and Other Tools in 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.

A restriction enzyme cleaves a circular plasmid vector to produce fragments : 1kb, 0.3kb, 2kb, 1kb and 0.3kb. How many bands will be visible on agarose gel?

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#Question id: 3216

#Section 3: Genetics, Cellular and Molecular Biology

The frequency of galactosemia is approximately 1 in 40,000 live births. The frequency of the carrier state can be calculated as

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#Question id: 14610

#Section 2: General Biology

Which molecules are associated with the cell wall of Gram-positive bacteria?

1. Peptidoglycan

2. L-form amino acids

3. Teichoic acids 

4. LPS

Which combination is correct?

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#Question id: 244

#Section 2: General Biology

The difference between dGMP and GMP is

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#Question id: 1576

#Section 2: General Biology

function of Properdin