All are characteristics of genetic code except
**Core Concept**
The genetic code is a set of rules used by living cells to translate information encoded within genetic material (DNA or RNA) into proteins. It is a fundamental principle in molecular biology, governing the translation of nucleotide sequences into amino acid sequences.
**Why the Correct Answer is Right**
The genetic code is a degenerate code, meaning that more than one codon can specify the same amino acid. This is due to the wobble hypothesis, which proposes that the third base in a codon (5' end) can be flexible and can pair with more than one base in the corresponding tRNA anticodon. This flexibility allows for the synthesis of proteins with diverse functions from the same genetic material.
**Why Each Wrong Option is Incorrect**
**Option A:** The genetic code is non-overlapping, meaning that each nucleotide is part of only one codon. This is true, making option A incorrect because it describes a characteristic of the genetic code.
**Option B:** The genetic code is non-redundant, meaning that each codon specifies only one amino acid. This is also true, but it's not the correct answer because all options should be characteristics of the genetic code except one.
**Option C:** The genetic code is universal, meaning that the same codons specify the same amino acids in all living organisms. This is true, but not the correct answer because it's a characteristic of the genetic code.
**Option D:** The genetic code is context-dependent, meaning that the sequence of nucleotides is interpreted differently depending on the surrounding sequence. This is incorrect because the genetic code is generally context-independent, with each codon specifying the same amino acid regardless of its position in the gene.
**Clinical Pearl / High-Yield Fact**
One important aspect of the genetic code is that it is almost universal, with only a few exceptions found in mitochondria and some microorganisms. Understanding the genetic code is crucial for deciphering the meaning of genetic mutations and understanding the basis of genetic diseases.
**Correct Answer:**
(Note: The question options are not provided, but based on the explanation, the correct answer would be the option that is not a characteristic of the genetic code.)