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What is a Single Nucleotide Polymorphism?

If two sequences of DNA from the same position along a DNA strand (locus) have a single change between them we call them single nucleotide (one base unit of DNA, A/T/C/G) polymorphism (poly- "many-&quot...
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Answered by Thomas K. • Biology tutor
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Examine the short term causes of Russia's 1917 Revolution.

The February revolution in Russia toppled the Romanov dynasty that had been ruling for 300 years. The revolution thereby was an extremely important event in Russia's history. This revolution, which happened ...
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Answered by Sasha G. • History tutor
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What is the differential of y =sin(2x)?

For this question we have to use the chain rule. The chain rule is dy/dx (the differential you are looking for) = du/dx (the differential of u with respect to x) * dy/du(the differential of y with respect to...
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Answered by Cem U. • Maths tutor
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How should I structure my essay?

You should start thinking about essay structure when planning your answer. Break the essay down into intro, 3 or 4 paragraphs and a conclusion. The purpose of the into is to 'unpick' the question - discuss k...
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Answered by Harjas D. • History tutor
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Calculate Gibbs free energy when S = 131 J mol-1 and H = 155 kJ mol-1 at 25 C, stating whether or not the reaction is feasable.

First, make sure everything is in the correct units: H = 155 kJ mol-1 = 155000 J mol-1 S = 131 J mol-1 T = 25 C = 298K Then use the Gibbs equation to calculate the free energy: G = H - TS G = 155000-298*131 ...
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Answered by Isaac H. • Chemistry tutor
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