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Describe the primary, secondary and tertiary structure of proteins

The primary structure of a protein involves a sequence of amino acids. This forms a polypeptide chain and there are 20 different amino acids that may contribute to the primary protein structure. The secondar...
AS
Answered by Annie S. • Biology tutor
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P is directly proportional to Q. When Q = 6, P = 15. Work out the value of P when Q = 3.5

If P is directly proportional to Q then that means if Q increases P will also increase. If Q decreases P will also decrease. Two values that are directly proportional to each other are related to each other ...
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Answered by Zsolt T. • Maths tutor
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How do you know which version of the word 'the' to use?

The word for 'the' which you use depends on the gender of the noun that follows it, and also what the noun is doing in a sentence. In the sentence 'The dog bites the cat', the dog is doing the action, which ...
KG
Answered by Katherine G. • German tutor
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Pourquoi est-ce que tant de jeunes fument ? A votre avis, qu’est-ce qu’il faut faire pour réduire le nombre de jeunes fumeurs ?

De nombreux adolescents fument régulièrement. Les causes de ceci sont un mélange d'addiction et d'atout social garanti par la cigarette. En effet, lors de 'soirées' parmi les jeunes, on trouve souvent des je...
ZJ
Answered by Zack J. • French tutor
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What does genotype mean?

Genotype is the genetic composition for a particular phenotype. It involves both alleles from both the father and mother. So a genotype of the colour of eyes (blue) could be bb or BB or Bb.
FA
Answered by Farid A. • Biology tutor
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