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What are the main characteristics of the phospholipid bilayer?

The phospholipid bilayer is the main component of the plasma membrane. Phospolipids consist of two parts with different properties. One part is often referred to as 'head' or 'water-loving', which is hydroph...
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Answered by Anna N. • Biology tutor
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What about simultaneous equations?

They are equations with variables that we have to find. They hold in the same time.
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Answered by Stefan O. • Maths tutor
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How should I improve my portfolio in order to achieve an A/A*?

In order to achieve the highest marks possible in A Level Fine Art, you must continuously make sure that you are hitting all of the Assessment Objectives (AOs) at different stages along your path. This can m...
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Answered by Deniz D. • Art tutor
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Ethane-1,2-diol can be dissolved in water to act as an anti-freeze in car radiators. Explain why ethane-1,2-diol is very soluble in water. (2)

Has O–H (bonds)OR has hydroxyl (groups) OR has hydroxy (groups) Forms hydrogen bonds with water (molecules)
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outline the mechanism for the nitration of methyl benzoate and show how sulfuric acid behaves as a catalyst

You will be given the equationThis reaction is an electrophilic substitution which is the most common reactions among benzene groups that you will come across at A levelThe question tells you that it is a ni...
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Answered by Monica A. • Chemistry tutor
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