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How come the antibodies in our blood and lymphatic system do not attack our own, but only specific antigens?

Antibodies and antigens are made out of proteins. Proteins have a specific primary structure. The primary structure is the sequence of the amino acids that make up the protein. This sequence is specific to a...
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Answered by Cassandra U. • Biology tutor
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How do you get from an a base like adenine to an enzyme/protein?

There are four bases- ATGC adenine, thymine guanine and cytosine. Each base is attached to a deoxyribose sugar and a phosphate sugar. This makes up a nucleotide. Three nucleotides are called a codon which pr...
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Answered by Joshny J. • Biology tutor
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Relationship between moles and Avogadro's constant

Moles equation is moles= mass/RFM Avogadro's constant is 6.x 10 23 . 1 mole means 6x 10 23 atoms/molecules. e.g. 2 mole of Cu weighs 128g. What is the weight of 1 Cu atom? 2 moles is 2x 6x10 23 atoms = 1.2x1...
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Answered by Joshny J. • Chemistry tutor
12503 Views

If m=a^x, n=a^y, and a^2 =(m^y n^x)^z Show xyz=1.

If m=a x n=a y and a 2 =(m y n x ) z Show xyz=1. The above question is an indices question from an AS textbook. This is question 7 so I will tell you now that this is perhaps a higher difficulty question but...
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Answered by Joshny J. • Maths tutor
17740 Views

What is the pluperfect tense and how is it formed?

The pluperfect tense helps to add extra information to an account from the past. It refers to events that took place before the events of the story in the past. For example, I went to the concert because I h...
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Answered by Imogen M. • French tutor
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