Question

which of the following incorrectly matches the term with its location?

dna is found in a chromosome.
chromosomes are found in the nucleus of a cell.
genes are located in a nucleotide.
nitrogen bases are located in the central rungs of a dna ladder.

Explanation:

Analyze the relationship between DNA and chromosomes

DNA is the genetic material that is packaged and organized into structures called chromosomes. Therefore, DNA is indeed found in a chromosome.

Analyze the relationship between chromosomes and the nucleus

In eukaryotic cells, chromosomes are housed inside the nucleus. Therefore, chromosomes are found in the nucleus of a cell.

Analyze the relationship between genes and nucleotides

Using the Basic Unit of Heredity and Gene Function knowledge points, we know that a gene is a segment of DNA that codes for a functional product. A nucleotide is a single building block of DNA. Since a gene consists of hundreds to thousands of nucleotides, genes cannot be located inside a single nucleotide; rather, nucleotides are located within genes. This statement is incorrect.

Analyze the location of nitrogen bases in DNA

DNA is structured like a double helix or a ladder. The sugar-phosphate backbones form the outer sides of the ladder, while the nitrogenous bases pair up to form the central rungs. Therefore, nitrogen bases are located in the central rungs of a DNA ladder.

Answer:

• DNA is found in a chromosome.
• Chromosomes are found in the nucleus of a cell.
• Genes are located in a nucleotide. (Correct answer)
• Nitrogen bases are located in the central rungs of a DNA ladder.