Genetic information in a DNA molecule is coded in the

Options

A. sequence of nucleotides
B. base pairing
C. turning pattern of helix
D. distance between base pairs

Answer

To answer the question "Genetic information in a DNA molecule is coded in the:", we can break it down into a step-by-step solution.

### Step-by-Step Solution:

1. **Understanding DNA Structure**:
- DNA (Deoxyribonucleic Acid) is composed of two strands that form a double helix. Each strand is made up of smaller units called nucleotides.

2. **Components of Nucleotides**:
- Each nucleotide consists of three components: a phosphate group, a sugar molecule (deoxyribose), and a nitrogenous base. The four types of nitrogenous bases in DNA are adenine (A), thymine (T), cytosine (C), and guanine (G).

3. **Genetic Code**:
- The sequence of these nitrogenous bases (A, T, C, G) encodes genetic information. The order of these bases determines the genetic instructions carried by the DNA.

4. **Triplet Code**:
- The genetic code is read in sets of three nucleotides, known as codons or triplets. Each triplet corresponds to a specific amino acid, which are the building blocks of proteins.

5. **Conclusion**:
- Therefore, the genetic information in a DNA molecule is coded in the sequence of nucleotides. This sequence dictates how proteins are synthesized in the cell, which is essential for the functioning of living organisms.

### Final Answer:
The genetic information in a DNA molecule is coded in the **sequence of nucleotides**.

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