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Describe the use of PCR and how exponential amplification can be achieved.

Polymerase chain reaction ( PCR ) is a technique used in molecular biology to amplify a single copy or a few copies of a segment of DNA across several orders of magnitude, generating thousands to millions of...
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Answered by Sam B. • Biology tutor
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With reference to two volcanic events that you have studied from contrasting areas of the world, compare the ways in which volcanoes and their hazards have been managed.

The management of a volcanic hazard can help to greatly reduce the negative impacts that an eruption can have on the population surrounding the area. The eruption of Nevado del Ruiz, Columbia, on the 13 th o...
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Answered by Laura S. • Geography tutor
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I wanted to practice talking about my holidays, what would some useful phrases be?

He visitado Francia hace 3 años - I visited France 3 years ago Fui con mi familia – I went with my family Me gustó la comida - I liked the food No he visitado España pero me gustaría ir porque ...... - I've ...
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Answered by Kai A. • Spanish tutor
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What are some of the key reasons for Hitlers rise to power?

The Wall Street Crash in 1929 caused huge economic problems for Germany. With millions unemployed, German citizens lost faith in the Weimar Government. Hitler was able to exploit this by promising to rebuild...
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Answered by Kai A. • History tutor
3181 Views

How do I calculate the reactant forces for the supports of the beam where the centre of mass is not same distance from each support?

This can be done by taking moments. To reduce the number of equations a moment should be taken so that one of the forces goes through the centre of place from which moments are being taken. We will choose to...
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Answered by Benjamin W. • Maths tutor
6950 Views