What is the main purpose of gene sequencing?

• A. To clone organisms
• B. To determine protein structures
• C. To identify the exact order of nucleotides in a DNA molecule
• D. To analyze phenotypic traits

Answer: (C)

The main purpose of gene sequencing is to identify the exact order of nucleotides in a DNA molecule. This process allows researchers to understand the genetic makeup of an organism, which is essential for various applications in genetics, genomics, and biotechnology. By determining the sequence of nucleotides—adenine, thymine, cytosine, and guanine—scientists can study genes, regulatory elements, and mutations that may be associated with diseases or traits.

Gene sequencing serves as a foundational tool in numerous areas, such as personalized medicine, evolutionary biology, and the development of genetic engineering techniques. With the specific sequence information, researchers can also advance cloning techniques and gain insights into protein synthesis, as the sequence of nucleotides directly relates to the amino acid sequence of proteins. Understanding the genetic code enables the manipulation of genes, which is crucial for developing new therapies, improving crops, and exploring genetic diversity.

The other options, while related to genetic study, do not capture the primary aim of gene sequencing. Cloning organisms is a separate process that can utilize sequencing data but does not focus on determining nucleotide orders. Similarly, determining protein structures and analyzing phenotypic traits are outcomes or applications that may rely on sequencing data but are not the primary goal of