it consists of 10- 20 amino acids ....more than this is called polypeptides.....
This is actually false. DNA strands that codes for amino acids do so using 3 nucleic acids to encode an amino acid. Since there are 4 nucleic acids with 3 positions each, there are 64 possible nucleic acid "words". There are only 20 amino acids that are directly coded by these 3-nucleic-acid-words. All 64 "words" are valid. but the number of nucleic acid "spellings" that code for a particular amino acid varies from 1 to 6. There are many mutations where one or more changes to a nucleic acid sequence will not change the protein being made; so long as the changes are simply different "spellings" of the same amino acid. A statistical example: There are around 57,000 different "spellings" of the first 10 amino acids in human serum albumin that will produce the protein correctly.
A peptide
If a polypeptide contains 9 peptide bonds, how many amino acids does it contain?
How many different arrangement of nucleotides are possible in a strand of DNA that is 15 nucleotides long?Read more: How_many_different_arrangement_of_nucleotides_are_possible_in_a_strand_of_DNA_that_is_15_nucleotides_long
it consists of 10- 20 amino acids ....more than this is called polypeptides.....
Each codon is three bases long - and a codon codes for one amino acid. Therefore this strand (9 bases long) could code for 3 amino acids. (Except if the DNA code was ACT, this would create the codon UGA on the mRNA, which is a stop codon. The amino acid chain would therefore terminate at this point).
In the genetic code, a sequence of three nucleotides forms a codon, which codes for one amino acid. So for each amino acid, there are three nucleotides. Therefore, 600 nucleotides are needed to make 200 amino acids.
This is actually false. DNA strands that codes for amino acids do so using 3 nucleic acids to encode an amino acid. Since there are 4 nucleic acids with 3 positions each, there are 64 possible nucleic acid "words". There are only 20 amino acids that are directly coded by these 3-nucleic-acid-words. All 64 "words" are valid. but the number of nucleic acid "spellings" that code for a particular amino acid varies from 1 to 6. There are many mutations where one or more changes to a nucleic acid sequence will not change the protein being made; so long as the changes are simply different "spellings" of the same amino acid. A statistical example: There are around 57,000 different "spellings" of the first 10 amino acids in human serum albumin that will produce the protein correctly.
A peptide
Of the 20 amino acids, 10 must be taken in from an outside source; these are called nonessential amino acids.============================================================Actually its the other way round, amino acids that the human body can't manufacture are called essential amino acids. Non-essential amino acids are able to be produced by the body. Of the 20 amino acids that our bodies use, the adult body is able to manufacture 12For more information, check the link below
They make up proteins.
If a polypeptide contains 9 peptide bonds, how many amino acids does it contain?
There are twenty amino acids, of which around half are made in the body. The other 10 are called 'essential amino acids', because they cannot be formed in our cells, so we must take them in, in our diet.
Amino acids are the building blocks of proteins.Amino acid molecules tied up and make a protein chain in D.N.A. There are different kind of amino acids.The type of amino acids decide the shape of the protein to perform repair work in the cell of our different organ. human body can not produce amino acids. It ingested in our body through food.
This is because animals are heterotrophic. We cannot manufacture essential amino acids in the body ( these are usually amino acids 8/10) so tear amino acids need to be obtained externally from food sources. Of we do not eat food the the body will not be able to produce these essential amino acids and the essential proteins that are needed by the body.
There are 20 naturally occurring amino acids that are used in the synthesis of proteins.