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What is meant by tertiary structure of proteins ?


Tertiary structure is the three-dimensional structure of a protein or nucleic acid. The folding of the the protein chain upon itself gives rise to the tertiary structure of the protein. It is very necessary for the biological activity of the protein. 


 

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Can you describe what happens when milk is converted into curd or yoghurt from your understanding of proteins.

When milk is converted to curd the bacteria lactobacillus acts on the milk proteins. The tertiary and secondary structure of the protein is denatured which result in the curdling of the milk. 
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Explain composition of triglyceride.

The triglycerides are made up of glycerol and three fatty acids. It is an ester of glycerol and fatty acids. The three fatty acids present in the triglycerides, may be same or different. 




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Draw the structure of amino acid, alanine.

Give the structure of amino acid, alanine.

Structure of Alanine

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Proteins have primary structure. If you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purify or homogeneity of a protein?

Yes, the arrangement of amino acids ie. the positional information in a protein-which is the first amino acid, which is second, and so on is called the primary structure of a protein. The primary structure is very necessary for the proper functioning of the protein because the sequence of amino acids are used as a code for the synthesis of different protein. Any change in the primary structure will give rise to a incorrect protein. Therefore if we know the sequence of a particular protein we can check the purity by comparing its sequence to the known sequence by experimental method. 
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