Answer:A). genome chromosome DNA molecule gene
Explanation: A genome is the totality of the DNA or genes that make up an organism. A genome involves the total number of genes present in all the DNAs of all the chromosomes in an organism. An organism has many chromosomes, for instance humans have 46 chromosomes. These chromosomes are made up of DNA molecules. Chromosomes are DNA molecules arranged in a threadlike manner. Chromosomes contains all the genetic information upon which an organism is built. A DNA molecule is made up of coding and noncoding segments. The segments of the DNA that codes for a particular protein or RNA is called a gene.
