## Core Concept
The genetic code is a set of rules used by living cells to translate information encoded within genetic material (DNA or RNA sequences) into proteins. It is nearly universal across organisms. The genetic code is based on the sequence of nucleotides (adenine, guanine, cytosine, and uracil/thymine) that are read in codons (sequences of three nucleotides).

## Why the Correct Answer is Right
The correct answer, , implies that the statement which does not hold true for the genetic code needs to be identified. Typically, characteristics of the genetic code include: it is degenerate (more than one codon can encode the same amino acid), it is universal (or nearly universal), and it is read in a continuous sequence without overlaps or gaps.

## Why Each Wrong Option is Incorrect
- **Option A:** If option A states a characteristic that is indeed true for the genetic code, such as degeneracy or universality, then it is incorrect as an exception.
- **Option B:** Similarly, if option B aligns with known features of the genetic code, it would not be the correct answer.
- **Option C:** This option would also be incorrect if it describes an accurate feature of the genetic code.

## Why the Correct Answer is Correct (Implicit)
Given that , this suggests the genetic code does not overlap, which is a true statement. The genetic code is read in non-overlapping codons, ensuring that each nucleotide is part of only one codon. This characteristic is fundamental to how genetic information is translated into proteins.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the genetic code is **degenerate** and **non-overlapping**. This means multiple codons can code for the same amino acid (degenerate), and once a codon is read, the next one starts at the next nucleotide without overlap.

## Correct Answer: D.