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Explain why cell surface membranes are also called 'phospholipid bilayers'?

A cell surface membrane is made up of a type of molecules called phospholipids , so what is a phospholipid bilayer ? The first step would be to break down the term. ‘ Phospho ’ means that the molecule(s) mus...
JC
Answered by Jamie C. • Biology tutor
10472 Views

Question: Expand (p + 2)(p - 5)

Expanding - or geting rid of brackets. Make sure you multiply everything by everything! Correct: p 2 +2p -5p -10 = p 2 -3p -10 Wrong: p 2 + 2p -5 ...forgot that the -5 also needs to be multiplied by (p+2) Wr...
AN
Answered by Abdul N. • Maths tutor
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Describe the process of transcription

Transcription takes place in the nucleus and is the first stage of protein synthesis. RNA polymerase attaches to the DNA double helix at the promoter sequence and unwinds the helix by breaking the hydrogen b...
JD
Answered by Jess D. • Biology tutor
4037 Views

How do I approach a literature or film essay question?

The idea of writing an analytical essay in French can seem daunting at first but it is important to feel confident, as the long essay questions can make up a considerable percentage of the marks in an A-Leve...
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Answered by Carys R. • French tutor
3638 Views

How do you know whether to use 'qui' or 'que'?

The easiest way to remember which of these pronouns to use is by learning the following simple rule: 'qui' comes before a verb, whereas 'que' comes before a subject noun or pronoun. For example, in the sente...
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Answered by Hannah O. • French tutor
3122 Views