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How can we isolate DNA from cells?

DNA isolation is important for experimental analysis and drug discovery across many biological disciplines. Firstly a cell culture must be homogenised to break down the cells into a uniform liquid, making...

Answered by George C. • Biology tutor

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What is the Hedonic Calculus?

The Hedonic Calculus is one of the central ideas of Bentham's Act Utilitarianism. Created by combining hedonism, (the pursuit of pleasures and avoidance of pains) and democracy (majority rule) the hedonic...

Answered by • Philosophy tutor

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The function f(x)=x^2 -2x -24x^(1/2) has one stationary point. Find the value of x when f(x) is stationary, and hence determine the nature of this stationary point.

dy/dx = 2x - 2 -12x^-1/2dy/dx = 02x - 2 - 12x^-1/2= 0x = 4 (stationary point)d²y/dx²= 2 + 6x^-3/2when x=4, d²y/dx²= 11/411/4 >...

Answered by • Maths tutor

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A curve has an equation of y=2x^2 + 7x -8 . Find the co-ordinates of the turning point

Student will need to understand that the turning point will be a minimum as the curve is positiveStudent should complete the square:1) factorise out the 2: 2(x²+ 7/2 x) - 82) complete the squa...

Answered by Farah H. • Maths tutor

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Take the 2nd derivative of 2e^(2x) with respect to x.

The second derivative is just two derivatives carried out back to back. In this case we just have to differentiate this function once, and then differentiate the result. The derivative of 2e^(2x) can then...

Answered by Patrick A. • Maths tutor

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