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1. Phototropins are enzymes found in the plasma membrane of particular cells. They are phosphorylated when hit by blue light.
   2) This phosphorylation triggers the movement of auxin across the plan...

An aldehyde will react with Tollen's reagent to form a characteristic silver mirror, whereas a ketone will not react. This is because an aldehyde can be oxidised to a carboxylic acid, reducing Tollen's re...

Completing the square means to put our equation into a slightly different form which looks like this, where a and b are real numbers:

(x+a)² + b = 0

From here, we...

This is a very important skill - for GCSE, above and below! 

The first stage is to read the poem at least twice, first just going over it, and the second time underlining or highlighting ...