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Q.

What are proteins? mention its constituents.

Asked by amitava duttamajumdar, 16 Jul '12 02:10 pm
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Answers (3)

1.

Proteins are probably the most important class of biochemical molecules, although of course lipids and carbohydrates are also essential for life. Proteins are the basis for the major structural components of animal and human tissue.

Proteins are natural polymer molecules consisting of amino acid units. The number of amino acids in proteins may range from two to several thousand. See Amino Acids.

Primary Protein Structure:

The primary protein structure is defined as the specific sequence of amino acids in the protein. In order to function properly, peptides and proteins must have the correct sequence of amino acids. In the section on peptide bonds, it was shown that a dipeptide consisting of two different amino acids could have two different sequences as in the example gly - ala or ala - gly.

Remember that as written left to right in gly-ala, the glycine has the "free" amine terminal end and alanine has the "free" carboxyl acid terminal end.

If three different amino acids ...more
Answered by LIPSIKA, 16 Jul '12 02:15 pm

 
  
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2.

Interesting BA
Answered by anil garg, 03 Dec '12 11:38 pm

 
  
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3.

Proteins ( /protinz/ or /proti.nz/) are biochemical compounds consisting of one or more polypeptides typically folded into a globular or fibrous form, facilitating a biological function.
A polypeptide is a single linear polymer chain of amino acids bonded together by peptide bonds between the carboxyl and amino groups of adjacent amino acid residues. The sequence of amino acids in a protein is defined by the sequence of a gene, which is encoded in the genetic code. In general, the genetic code specifies 20 standard amino acids; however, in certain organisms the genetic code can include selenocysteine andin certain archaeapyrrolysine. Shortly after or even during synthesis, the residues in a protein are often chemically modified by posttranslational modification, which alters the physical and chemical properties, folding, stability, activity, and ultimately, the function of the proteins. Sometimes proteins have non-peptide groups attached, which can be called prosthetic groups or cofac ...more
Source: FIR SAY COPY MAARA
Answered by ankit shivam, 16 Jul '12 02:11 pm

 
  
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