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How does the inside of a cell compare to a galaxy?

Both the inside of a cell and a galaxy fall into a stable pattern, with a clear centre. In the natural world, there are lots of stable forms both in biology and physics - unstable things do not last for very...
CM
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What is the difference between DNA and mRNA?

DNA is much longer than mRNA and forms a chromosome, whereas mRNA is much shorter; corresponding to a single gene. DNA is structurally different; it is usually found as a double helix and contains the base t...
CM
Answered by Charlotte M. • Biology tutor
4885 Views

Explain the need for neuronal communication over chemical signalling or passive electrical signalling

Neurons are required to send messages at high speeds over long distances. For example, reflex reactions occur in the order of fractions of seconds, and some neurons carry messages over 1m in distance.Accordi...
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Answered by Rose F. • Biology tutor
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A curve is defined by the equation y = (x + 3)(x – 4). Find the coordinates of the turning point of the curve.

The turning point of a curve is the point at which it will turn, therefore, either the maximum or minimum point. Firstly, you need to expand out the brackets so the equation looks like a standard curve equat...
CM
4000 Views

0.15^2 x (1-0.15)^3 to 2 s.f

BIDMASFirst must donwhat is inside the brackets1-0.15 = 0.85Next must do the indices 0.85^3= 0.6141250.15^2 =0.0225Then multiply0.0225 x 0.614125 = 0.01381781shorten to 2 s.f0.014
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Answered by Francesca M. • Maths tutor
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