Which of the following correctly organizes these genetic terms in order from smallest to largest?
a. chromosome, gene, nucleotide, dna
b. nucleotide, gene, dna, chromosome
c. dna, nucleotide, gene, chromosome
d. dna, nucleotide, chromosome, gene

The right option is; B. nucleotide, gene, DNA, chromosome

Nucleotides are the building blocks of nucleic acids (such as DNA and RNA), and are made up of a nucleoside that is joined to a phosphate group.  

Genes are an important sequence of nucleotides, and small part of DNA that contains information for a specific protein.  

DNA is a genetic material that stores information as a code which is composed of four chemical bases (adenine (A), guanine (G), cytosine (C), and thymine (T)).  

Chromosomes are thread-like structures in which DNA molecule (nucleic acid) and protein (histones) are packaged in the cell’s nucleus. Chromosomes functions by carrying genetic information in the form of genes.

Nucleotide, gene, DNA, and chromosome are genetic terms organized in order from smallest to largest.

Further Explanation:

The nucleic acid is mainly composed of small nucleotides. Every nucleotide is composed of deoxyribose, nitrogenous base, and phosphate group. DNA is made up of four distinct type of nitrogenous base:

Gene is defined as the linear sequence of the nucleotides that are mainly encoded for a protein having a particular function. The alleles are defined as the variant type of the gene. DNA is mainly made up of the nucleotides and also contains genetic information in the genes.

Each and every single chromosome consists of genes. The chromosomes are mainly present in the nucleus of a cell and it is made up of single molecule of DNA as well as proteins. The bunch like structures present in the chromosome is called nucleosomes which are considered as the smallest unit of a DNA packaging. The structural unit of a nucleosome is histones that are bound tightly in a helical fiber.

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Answer Details:

Grade: High School

Subject: Molecular Biology

Chapter: Gene expression

Keywords:

DNA, RNA, guanine, adenine, cytosine, gene, chromosome, genetic information, nucleosome, thymine, nucleotide.

is this for the e2020 class