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Describe the sequence of events in DNA transcription

An enzyme called DNA helicase breaks the hydrogen bonds holding the complimentary base pairs together in a double stranded DNA molecule. This causes the DNA helix to unwind, exposing the unpaired bases. Anot...
EM
Answered by Ellie M. • Biology tutor
3930 Views

How do I find the equation of the normal to the curve y=x^2 at the point (x1,y1)? Where x1=2 and y1=4 .

I would get the student to draw a diagram of the situation.. so draw the curve y=x^2, the tangent at (2,4) and then the normal. Then I would highlight to them that the equation we want is the equation of a s...
MM
Answered by Mohammad M. • Maths tutor
4806 Views

What does differentiation actually do?

Differentiation allows you to find the rate of change of a variable relative to another, which is basically the gradient. So if you had a speed-time graph, finding the amount that speed changes over a given ...
KS
Answered by Kourosh S. • Maths tutor
4328 Views

Find the equation of the tangent to the circle x^2 + y^2 + 10x + 2y + 13 = 0 at the point (-3, 2)

First, what is a tangent? A line which touches a circle (or ellipse) at just one point. In our case (-3,2) As it touches the line at one point, it is perpendicular the radius at (-3,2). Which implies that th...
PD
Answered by Patrick D. • Maths tutor
7072 Views

When is Chi-squared the most appropriate statistical test to use?

Chi-squared is about establishing whether the difference in results between groups is likely to be due to chance, or due to some genuine difference in the groups' properties. It aims to answer the question, ...
AP
Answered by Anastasia P. • Biology tutor
3102 Views