What are the odds of finding non-coding DNA that by chance in a given reading frame would have an open reading frame of length 20 if each nucleotide occurs at equal frequency in the genome?
1. 38%
2. 36%
3. 17%
4. <1%
4. 42%
the odds of finding non-coding DNA that by chance in a given reading frame would have an open reading frame of length 20 if each nucleotide occurs at equal frequency in the genome would be-
4) <1%
This is because genes that code for proteins only comprise open reading frames (ORFs) consisting of a series of codons that specify the amino acid sequence of the protein that the gene codes for.
The ORF begins with an initiation codon - usually (but not always) ATG - and ends with a termination codon: TAA, TAG or TGA
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