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First, work out what number is a common factor of both terms - in other words what number 'goes into' both 27 and 3? 3 is a factor of both so put 3 outside the bracket. = 3( __ - __) Now work out what goe...

Both "ser" and "estar" mean "to be". However they both have different purposes in Spanish. "Ser" is the verb used to to denote a permanent state of being, whilst &q...

Messenger RNA is produced via the process of transcription. DNA is transcribed into mRNA using RNA polymerase. First, the double helix structure of the DNA unravels, and the hydrogen bonds break between t...

The mass number defines the number of protons and neutrons in an atom. The atomic number shows the number of protons in an atom (nucleus). Because there is the same number of protons as e...

This question is an example of simultaneous equations. It's very important to show your working on this question otherwise you won't get any marks, even if you get the right answer! All simultaneous quest...