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At first, the shape of the Hb makes it hard for oxygen to bind to one of the polypeptide subunits so at low concentrations of oxygen, the saturation of oxygen is low too.
Once the first molecule of o...

Use the 'crab claw' technique for which order to expand your brackets in (demonstrate by drawing with whiteboard). So start with 2x multiplied by x = 2x^2. Then 2x multiplied by 3 = 6x. Then 4 m...

So with these kind of questions they tend to be more of a first part to a question, probably worth about two marks on an A Level exam.The first thing to spot with this question is that f(x) contains a pro...

So to get 11 you could roll a 5 and a 6 or a 6 and a 5.Probability of rolling 5 and 6 = 1/6 x 1/6 = 1/36Probability or rolling 6 and 5 = 1/6 x 1/6 = 1/36So probability of rolling an 11 is 2/36

Here I would include all the working out. If the question was different, I'd also draw more diagrams and illustrate the question better, as I believe it's easier to remember and understand that way.x = 5y...