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Transcription is the sythesis of mRNA, where the DNA code is coverted to a complementary DNA code. Translation occurs where the mRNA is decoded by a ribosome to produce a specific amino acid chain or polypep...

A tin contains red, white and blue beads in the ratio red:white:blue = x:2x:x^2 First we should find the total number of beads in the tin: x + 2x + x^2 = 3x + x^2 The number of blue beads is x^2 So the fract...

In a survey people had to choose either A, B, C or D. The percentage of people that chose B, C and D are shown here: B- 25% C- 35% D- 30% You are also told that 150 people chose B. How many chose A? So first...

Algebra is always a bit confusing when you first learn is as it's the first time letters come into maths, here is the mainthing you should remember: you have to do the same thing to both sides of the equatio...

Jodie works for a bookshop, she is paid £6.50 an hour plus 5% of the cost of each book she sells. On Saturday she worked for 3 hours and sold £220 worth of books. How much did she earn on saturday? Here we n...