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Proteins are an important part of a healthy diet because they provide essential amino acids. (a) State what is meant by an essential amino acid.

There are 20 amino acids, and they can be classified as essential or non-essential – if they are non-essential they can be synthesised by the human body by itself, with no need to supplement them in the diet...
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Answered by Darragh C. • Chemistry tutor
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The recommended daily allowance of methionine for an adult is 15 mg per kg of body mass. Tuna contains 755 mg of methionine per 100 g portion. Calculate the mass, in grams, of tuna that would provide the RDA of methionine for a 60 kg adult.

15mg per kilo recommended dose 15x60 = 900mg recommended dose for a 60kg adult There is 755mg per 100g portion of tuna So 900/755 = 1.19 times the amount in 100g of tuna is the recommended dose 1.19 x 100 = ...
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Answered by Darragh C. • Chemistry tutor
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How do I decide which essay to write?

During the exam, the essay titles are out of your hands so all you can do is pick the essay that suits you and your knowledge best and go from there. Some people can be tempted to only learn one book in deta...
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Answered by Sally T. • Spanish tutor
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How do I sit an oral exam?

I am very sympathetic because oral exams are my least favourite part of my subject, even at degree level, and honestly the best thing to do is practise! Try talking to yourself in your head in French, try to...
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Answered by Sally T. • French tutor
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How do I remember so many dates and events in sequence?

My top tip for remembering dates is, grab a family member (mums are least likely to say no) and talk them thorugh your history curriculum. If when you're teaching them, you find big gaps in your knowledge th...
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Answered by Sally T. • History tutor
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