Which statement best expresses the relationship between the three structures represented below? (1) DNA is produced from protein absorbed by the cell. (2) Protein is composed of DNA that is produced in the cell. (3) DNA controls the production of protein in the cell. (4) Cells make DNA by digesting protein.

Option number 3 that is DNA controls the production of proteins in the cell is the best relationship between the three structures which are DNA, Protein and cell.

Explanation:

DNA is an important part of every prokaryotic and eukaryotic cell. DNA stands for Deoxyribonucleic Acid. It is a long molecule made up of multiple single units called a Nucleotide. Each nucleotide contains a phosphate group (PO4), a sugar group and a nitrogenous base. DNA is composed of two long chains that wind around each other to form a double helical structure that contains genetic instructions and information regarding the development, functioning, growth and reproduction of all organisms known. This is all achieved via formation of proteins through a process known as Transcription and Translation.

Information about a particular protein formation is transcribed from a DNA into mRNA known as Transcription which is then translated into a molecule known as Protein in a process called Translation. This is how DNA controls the production of Proteins in the cells.

As far as other options in the asked question are concerned, DNA is not formed from protein but rather derived from linking up of nucleotides.

Proteins are not composed of DNA but are made up of building blocks which are known as Amino Acids. Amino Acids are organic molecules which have both a carboxyl (-COOH) and an amino (-NH2) group.

Cells do not make DNA by digesting proteins, rather proteins are degraded back into Amino acids when digested.