The molecular mass of a protein is 22 kda. The size of the cdna (excluding the untranslated regions) that codes for this protein is _______ kb (rounded off to 1 decimal place).
Answers
Answer:
0.6
Explanation:
based on DNA/ protein conversion table
1kb dna = 333 amino acid
1000bp = 37 kDaltons
As Average molecular weight of 1 amino acid = 110 daltons
27 bp DNA = 1 kDalton
27*22 = 594 bp = 0.6 kbp = 22 kDalton protein
The molecular mass of a protein, expressed in kiloDaltons (kDa), is not directly related to the size of the complementary DNA (cDNA) that codes for that protein, expressed in kilobases (kb). The molecular mass of a protein is determined by the number of amino acids and their sequence, while the size of the cDNA that codes for that protein is determined by the number of nucleotides in the coding regions of the cDNA.
To estimate the size of the cDNA, we need to consider the average size of a codon (3 nucleotides), and the number of codons needed to code for the protein. On average, it takes about 3 nucleotides to code for each amino acid in a protein.
If the molecular mass of a protein is 22 kDa, this would translate to approximately 22,000 Daltons. If we assume that the average size of an amino acid is 110 Daltons, this would mean that the protein is approximately 200 amino acids long.
Since it takes 3 nucleotides to code for each amino acid, this would mean that the cDNA would be approximately 600 nucleotides long. Divide this number by 1000 to convert it to kb, and you would get an estimate of the size of the cDNA that codes for this protein: approximately 0.6 kb.
The actual size of the cDNA could be different based on the specific amino acid sequence of the protein.
For more such questions on molecular mass: https://brainly.in/question/33766177
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