Which statement best describes the role of DNA in a cell?

Which statement best describes the role of DNA in a cell?

• A. DNA contains the instructions for, and controls, the production of proteins
• B. DNA stores energy for metabolic reactions
• C. DNA acts as enzymes in metabolic pathways
• D. DNA is the primary component of cell membranes

Answer: (A)

Genetic information stored in DNA is used to make proteins, and this control of protein production drives most cellular activities. The sequence of nucleotides in genes provides the template for transcription into messenger RNA, which is then translated by ribosomes into specific proteins. These proteins carry out the vast majority of cellular functions, from catalyzing reactions as enzymes to forming structures and regulating processes. Because DNA sets which proteins are produced and in what amounts, it effectively directs cellular behavior and traits. DNA does not store metabolic energy (that role belongs to molecules like ATP), nor does it act as enzymes, and it is not a primary component of cell membranes.

Genetic information stored in DNA is used to make proteins, and this control of protein production drives most cellular activities. The sequence of nucleotides in genes provides the template for transcription into messenger RNA, which is then translated by ribosomes into specific proteins. These proteins carry out the vast majority of cellular functions, from catalyzing reactions as enzymes to forming structures and regulating processes. Because DNA sets which proteins are produced and in what amounts, it effectively directs cellular behavior and traits. DNA does not store metabolic energy (that role belongs to molecules like ATP), nor does it act as enzymes, and it is not a primary component of cell membranes.